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

remoting/client/plugin/pepper_input_handler.h

Index: remoting/client/plugin/pepper_input_handler.h
diff --git a/remoting/client/plugin/pepper_input_handler.h b/remoting/client/plugin/pepper_input_handler.h
index 4db2f8797f75bf276b0be343cf0fb0dcb599db14..385cb8a9f1e8c73da1c2b4a0aaabfa107c37743e 100644
--- a/remoting/client/plugin/pepper_input_handler.h
+++ b/remoting/client/plugin/pepper_input_handler.h
@@ -7,6 +7,8 @@
 
 #include "remoting/client/input_handler.h"
 
+#include "third_party/ppapi/c/pp_event.h"
+
 namespace remoting {
 
 class PepperInputHandler : public InputHandler {
@@ -18,6 +20,10 @@ class PepperInputHandler : public InputHandler {
 
   void Initialize();
 
+  void HandleMouseMoveEvent(const PP_Event_Mouse& event);
+  void HandleMouseButtonEvent(bool button_down,
+                              const PP_Event_Mouse& event);
+
  private:
   DISALLOW_COPY_AND_ASSIGN(PepperInputHandler);
 };