Minimum implementation of ARC clipboard Bridge

components/arc/arc_bridge_service.cc

Index: components/arc/arc_bridge_service.cc
diff --git a/components/arc/arc_bridge_service.cc b/components/arc/arc_bridge_service.cc
index 2d10d8a468d1e9ed5c41ae273a15c436f1e980ce..37c6d70d76fa88723f23f5c88a171536f76f3d21 100644
--- a/components/arc/arc_bridge_service.cc
+++ b/components/arc/arc_bridge_service.cc
@@ -80,6 +80,31 @@ void ArcBridgeService::CloseAppChannel() {
   FOR_EACH_OBSERVER(Observer, observer_list(), OnAppInstanceClosed());
 }
 
+void ArcBridgeService::OnClipboardInstanceReady(
+    ClipboardInstancePtr clipboard_ptr) {
+  DCHECK(CalledOnValidThread());
+  temporary_clipboard_ptr_ = std::move(clipboard_ptr);
+  temporary_clipboard_ptr_.QueryVersion(base::Bind(
+      &ArcBridgeService::OnClipboardVersionReady, weak_factory_.GetWeakPtr()));
+}
+
+void ArcBridgeService::OnClipboardVersionReady(int32_t version) {
+  DCHECK(CalledOnValidThread());
+  clipboard_ptr_ = std::move(temporary_clipboard_ptr_);
+  FOR_EACH_OBSERVER(Observer, observer_list(), OnClipboardInstanceReady());
+  clipboard_ptr_.set_connection_error_handler(base::Bind(
+      &ArcBridgeService::CloseClipboardChannel, weak_factory_.GetWeakPtr()));
+}
+
+void ArcBridgeService::CloseClipboardChannel() {
+  DCHECK(CalledOnValidThread());
+  if (!clipboard_ptr_)
+    return;
+
+  clipboard_ptr_.reset();
+  FOR_EACH_OBSERVER(Observer, observer_list(), OnClipboardInstanceClosed());
+}
+
 void ArcBridgeService::OnInputInstanceReady(InputInstancePtr input_ptr) {
   DCHECK(CalledOnValidThread());
   temporary_input_ptr_ = std::move(input_ptr);
@@ -226,6 +251,7 @@ void ArcBridgeService::CloseAllChannels() {
   // Call all the error handlers of all the channels to both close the channel
   // and notify any observers that the channel is closed.
   CloseAppChannel();
+  CloseClipboardChannel();
   CloseInputChannel();
   CloseNotificationsChannel();
   ClosePowerChannel();