Add mouse event support to Chromoting client (Pepper and X11).

remoting/client/input_handler.h

Index: remoting/client/input_handler.h
diff --git a/remoting/client/input_handler.h b/remoting/client/input_handler.h
index 9cbdd7d7fe92ac1c35b68b2e4223efbabc574fc1..ef9659d0650afa5443e646f90bd733de49ac817c 100644
--- a/remoting/client/input_handler.h
+++ b/remoting/client/input_handler.h
@@ -7,6 +7,7 @@
 
 #include "base/basictypes.h"
 #include "base/task.h"
+#include "remoting/base/protocol/chromotocol.pb.h"
 
 namespace remoting {
 
@@ -18,19 +19,29 @@ class InputHandler {
  public:
   InputHandler(ClientContext* context,
                HostConnection* connection,
-               ChromotingView* view)
-      : context_(context),
-        connection_(connection),
-        view_(view) {}
+               ChromotingView* view);
   virtual ~InputHandler() {}
 
   virtual void Initialize() = 0;
 
  protected:
+  void SendMouseMoveEvent(int x, int y);
+  void SendMouseButtonEvent(bool down, MouseButton button);
+
   ClientContext* context_;
   HostConnection* connection_;
   ChromotingView* view_;
 
+ private:
+  // True if we should send the next mouse position as an absolute value rather
+  // than a relative value. After sending a single absolute mouse position,
+  // it will automatically switch back to sending relative mouse deltas.
+  bool send_absolute_mouse_;
+
+  // Current (x,y) position of mouse pointer.
+  // This is the last value that we sent to the host.
+  int mouse_x_, mouse_y_;
+
   DISALLOW_COPY_AND_ASSIGN(InputHandler);
 };