Minimum implementation of ARC clipboard Bridge

components/arc/arc_bridge_service.h

Index: components/arc/arc_bridge_service.h
diff --git a/components/arc/arc_bridge_service.h b/components/arc/arc_bridge_service.h
index 3f02b272d8665dd0b5fa7ed3c9e0a1366f0d4706..e3832092cd2134d1656e49b94cadb11c0e23375b 100644
--- a/components/arc/arc_bridge_service.h
+++ b/components/arc/arc_bridge_service.h
@@ -110,6 +110,22 @@ class ArcBridgeService {
     virtual ~AppObserver() {}
   };
 
+  // Notifies ARC Clipboard related events.
+  class ClipboardObserver {
+   public:
+    // Called when the Android clipboard content is changed. This is
+    // typically fired when a user initiates a "Copy" action.
+    virtual void OnSetClipboardContent(const std::string& text) {}
+
+  // Called when the Android clipboard decides to update its content.
+  // This is triggered when a "Paste" action is fired or an app
+  // or a service tries to retrieve the Android clipboard content.

[elijahtaylor1, 2015/12/15 01:17:05]

nit: alignment

[cnwan, 2015/12/21 11:18:00]

Done.

+    virtual void OnGetClipboardContent() {}
+
+   protected:
+    virtual ~ClipboardObserver() {}
+  };
+
   virtual ~ArcBridgeService();
 
   // Gets the global instance of the ARC Bridge Service. This can only be
@@ -146,6 +162,11 @@ class ArcBridgeService {
   void AddAppObserver(AppObserver* observer);
   void RemoveAppObserver(AppObserver* observer);
 
+  // Adds or removes ARC clipboard observers. This can only be called on the
+  // thread that this class was created on.
+  void AddClipboardObserver(ClipboardObserver* observer);
+  void RemoveClipboardObserver(ClipboardObserver* observer);
+
   // Gets the current state of the bridge service.
   State state() const { return state_; }
 
@@ -178,6 +199,9 @@ class ArcBridgeService {
                               const std::string& activity,
                               ScaleFactor scale_factor) = 0;
 
+  // Sends the Chrome clipboard content to Android.
+  virtual bool SendClipboardContentToAndroid(const std::string& text) = 0;
+
  protected:
   ArcBridgeService();
 
@@ -188,10 +212,15 @@ class ArcBridgeService {
   void SetAvailable(bool availability);
 
   base::ObserverList<Observer>& observer_list() { return observer_list_; }
+
   base::ObserverList<NotificationObserver>& notification_observer_list() {
     return notification_observer_list_;
   }
 
+  base::ObserverList<ClipboardObserver>& clipboard_observer_list() {
+    return clipboard_observer_list_;
+  }
+
   base::ObserverList<AppObserver>& app_observer_list() {
     return app_observer_list_;
   }
@@ -206,7 +235,7 @@ class ArcBridgeService {
 
   base::ObserverList<Observer> observer_list_;
   base::ObserverList<NotificationObserver> notification_observer_list_;
-
+  base::ObserverList<ClipboardObserver> clipboard_observer_list_;
   base::ObserverList<AppObserver> app_observer_list_;
 
   base::ThreadChecker thread_checker_;