Add touch events to the protocol, the stub layer, and to the client plugin.

remoting/protocol/input_stub.h

Index: remoting/protocol/input_stub.h
diff --git a/remoting/protocol/input_stub.h b/remoting/protocol/input_stub.h
index b60dacf42cfd1cff131a3af2fdc9efb993f8408f..4277713c95f450663e230fc0674bf1805a092a80 100644
--- a/remoting/protocol/input_stub.h
+++ b/remoting/protocol/input_stub.h
@@ -16,6 +16,7 @@ namespace protocol {
 class KeyEvent;
 class TextEvent;
 class MouseEvent;
+class TouchEvent;
 
 class InputStub {
  public:
@@ -27,6 +28,7 @@ class InputStub {
   virtual void InjectKeyEvent(const KeyEvent& event) = 0;
   virtual void InjectTextEvent(const TextEvent& event) = 0;
   virtual void InjectMouseEvent(const MouseEvent& event) = 0;
+  virtual void InjectTouchEvent(const TouchEvent& event) = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(InputStub);