plaidstore.diff

diff --git a/content/browser/BUILD.gn b/content/browser/BUILD.gn
index 75fc9d9d1826..042eacb39ba3 100644
--- a/content/browser/BUILD.gn
+++ b/content/browser/BUILD.gn
@@ -1299,6 +1299,8 @@ jumbo_source_set("browser") {
     "picture_in_picture/picture_in_picture_session.h",
     "picture_in_picture/picture_in_picture_window_controller_impl.cc",
     "picture_in_picture/picture_in_picture_window_controller_impl.h",
+    "plaidstore/plaidstore_impl.h",
+    "plaidstore/plaidstore_impl.cc",
     "portal/portal.cc",
     "portal/portal.h",
     "portal/portal_navigation_throttle.cc",
diff --git a/content/browser/browser_interface_binders.cc b/content/browser/browser_interface_binders.cc
index 361e52b1c203..14748ef44d2a 100644
--- a/content/browser/browser_interface_binders.cc
+++ b/content/browser/browser_interface_binders.cc
@@ -86,6 +86,7 @@
 #include "third_party/blink/public/mojom/payments/payment_app.mojom.h"
 #include "third_party/blink/public/mojom/permissions/permission.mojom.h"
 #include "third_party/blink/public/mojom/picture_in_picture/picture_in_picture.mojom.h"
+#include "third_party/blink/public/mojom/plaidstore/plaidstore.mojom.h"
 #include "third_party/blink/public/mojom/presentation/presentation.mojom.h"
 #include "third_party/blink/public/mojom/quota/quota_dispatcher_host.mojom.h"
 #include "third_party/blink/public/mojom/sms/sms_receiver.mojom.h"
@@ -109,6 +110,7 @@
 #include "third_party/blink/public/mojom/serial/serial.mojom.h"
 #endif
 
+
 #if defined(OS_ANDROID)
 #include "content/browser/android/date_time_chooser_android.h"
 #include "content/browser/android/text_suggestion_host_android.h"
@@ -660,6 +662,10 @@ void PopulateFrameBinders(RenderFrameHostImpl* host,
   map->Add<blink::mojom::SerialService>(base::BindRepeating(
       &RenderFrameHostImpl::BindSerialService, base::Unretained(host)));
 #endif  // !defined(OS_ANDROID)
+
+  map->Add<blink::mojom::PlaidStore>(
+      base::BindRepeating(&RenderFrameHostImpl::CreatePlaidStore,
+                          base::Unretained(host)));
 }
 
 void PopulateBinderMapWithContext(
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index e55e2d990da4..df6e6e62dbae 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -80,6 +80,7 @@
 #include "content/browser/permissions/permission_controller_impl.h"
 #include "content/browser/permissions/permission_service_context.h"
 #include "content/browser/permissions/permission_service_impl.h"
+#include "content/browser/plaidstore/plaidstore_impl.h"
 #include "content/browser/portal/portal.h"
 #include "content/browser/presentation/presentation_service_impl.h"
 #include "content/browser/push_messaging/push_messaging_manager.h"
@@ -6619,6 +6620,11 @@ void RenderFrameHostImpl::CreateInstalledAppProvider(
   InstalledAppProviderImpl::Create(this, std::move(receiver));
 }
 
+void RenderFrameHostImpl::CreatePlaidStore(
+    mojo::PendingReceiver<blink::mojom::PlaidStore> receiver) {
+  PlaidStoreImpl::Create(this, std::move(receiver));
+}
+
 void RenderFrameHostImpl::CreateDedicatedWorkerHostFactory(
     mojo::PendingReceiver<blink::mojom::DedicatedWorkerHostFactory> receiver) {
   // Allocate the worker in the same process as the creator.
diff --git a/content/browser/frame_host/render_frame_host_impl.h b/content/browser/frame_host/render_frame_host_impl.h
index 0769246d348b..38b071339833 100644
--- a/content/browser/frame_host/render_frame_host_impl.h
+++ b/content/browser/frame_host/render_frame_host_impl.h
@@ -102,6 +102,7 @@
 #include "third_party/blink/public/mojom/notifications/notification_service.mojom-forward.h"
 #include "third_party/blink/public/mojom/payments/payment_app.mojom.h"
 #include "third_party/blink/public/mojom/permissions/permission.mojom.h"
+#include "third_party/blink/public/mojom/plaidstore/plaidstore.mojom.h"
 #include "third_party/blink/public/mojom/portal/portal.mojom-forward.h"
 #include "third_party/blink/public/mojom/presentation/presentation.mojom.h"
 #include "third_party/blink/public/mojom/scroll/scroll_into_view_params.mojom.h"
@@ -1183,6 +1184,9 @@ class CONTENT_EXPORT RenderFrameHostImpl
   void CreateInstalledAppProvider(
       mojo::PendingReceiver<blink::mojom::InstalledAppProvider> receiver);
 
+  void CreatePlaidStore(
+      mojo::PendingReceiver<blink::mojom::PlaidStore> receiver);
+
 #if defined(OS_ANDROID)
   void BindNFCReceiver(mojo::PendingReceiver<device::mojom::NFC> receiver);
 #endif
diff --git a/content/browser/plaidstore/plaidstore_impl.cc b/content/browser/plaidstore/plaidstore_impl.cc
new file mode 100644
index 000000000000..3f6304173ceb
--- /dev/null
+++ b/content/browser/plaidstore/plaidstore_impl.cc
@@ -0,0 +1,47 @@
+#include "content/browser/plaidstore/plaidstore_impl.h"
+#include "content/public/browser/render_frame_host.h"
+#include "mojo/public/cpp/bindings/self_owned_receiver.h"
+
+namespace content {
+
+PlaidStoreImpl::PlaidStoreImpl(
+    RenderFrameHost *render_frame_host)
+    : render_frame_host_(render_frame_host) {}
+
+PlaidStoreImpl::~PlaidStoreImpl() {}
+
+void PlaidStoreImpl::StoreData(
+    const std::string &key,
+    const std::vector<uint8_t> &data) {
+  if (!render_frame_host_->IsRenderFrameLive()) {
+    return;
+  }
+  data_store_[key] = data;
+}
+
+void PlaidStoreImpl::GetData(
+    const std::string &key,
+    uint32_t count,
+    GetDataCallback callback) {
+  if (!render_frame_host_->IsRenderFrameLive()) {
+    std::move(callback).Run({});
+    return;
+  }
+  auto it = data_store_.find(key);
+  if (it == data_store_.end()) {
+    std::move(callback).Run({});
+    return;
+  }
+  std::vector<uint8_t> result(it->second.begin(), it->second.begin() + count);
+  std::move(callback).Run(result);
+}
+
+// static
+void PlaidStoreImpl::Create(
+    RenderFrameHost *render_frame_host,
+    mojo::PendingReceiver<blink::mojom::PlaidStore> receiver) {
+  mojo::MakeSelfOwnedReceiver(std::make_unique<PlaidStoreImpl>(render_frame_host),
+                              std::move(receiver));
+}
+
+} // namespace content
diff --git a/content/browser/plaidstore/plaidstore_impl.h b/content/browser/plaidstore/plaidstore_impl.h
new file mode 100644
index 000000000000..42363c1ddf09
--- /dev/null
+++ b/content/browser/plaidstore/plaidstore_impl.h
@@ -0,0 +1,35 @@
+#include <string>
+#include <vector>
+
+#include "third_party/blink/public/mojom/plaidstore/plaidstore.mojom.h"
+
+namespace content {
+
+class RenderFrameHost;
+
+class PlaidStoreImpl : public blink::mojom::PlaidStore {
+ public:
+  explicit PlaidStoreImpl(RenderFrameHost *render_frame_host);
+
+  static void Create(
+      RenderFrameHost* render_frame_host,
+      mojo::PendingReceiver<blink::mojom::PlaidStore> receiver);
+
+  ~PlaidStoreImpl() override;
+
+  // PlaidStore overrides:
+  void StoreData(
+      const std::string &key,
+      const std::vector<uint8_t> &data) override;
+
+  void GetData(
+      const std::string &key,
+      uint32_t count,
+      GetDataCallback callback) override;
+
+ private:
+  RenderFrameHost* render_frame_host_;
+  std::map<std::string, std::vector<uint8_t> > data_store_;
+};
+
+} // namespace content
diff --git a/third_party/blink/public/mojom/BUILD.gn b/third_party/blink/public/mojom/BUILD.gn
index c33e993abf2c..583393dacc49 100644
--- a/third_party/blink/public/mojom/BUILD.gn
+++ b/third_party/blink/public/mojom/BUILD.gn
@@ -101,6 +101,7 @@ mojom("mojom_platform") {
     "permissions/permission_automation.mojom",
     "permissions/permission_status.mojom",
     "picture_in_picture/picture_in_picture.mojom",
+    "plaidstore/plaidstore.mojom",
     "plugins/plugin_registry.mojom",
     "presentation/presentation.mojom",
     "push_messaging/push_messaging.mojom",
diff --git a/third_party/blink/public/mojom/plaidstore/plaidstore.mojom b/third_party/blink/public/mojom/plaidstore/plaidstore.mojom
new file mode 100644
index 000000000000..b1e02580b1dd
--- /dev/null
+++ b/third_party/blink/public/mojom/plaidstore/plaidstore.mojom
@@ -0,0 +1,11 @@
+module blink.mojom;
+
+// This interface provides a data store
+interface PlaidStore {
+
+  // Stores data in the data store
+  StoreData(string key, array<uint8> data);
+
+  // Gets data from the data store
+  GetData(string key, uint32 count) => (array<uint8> data);
+};