[Android] Select text when stylus first button is pressed.

content/browser/renderer_host/input/motion_event_android.h

Index: content/browser/renderer_host/input/motion_event_android.h
diff --git a/content/browser/renderer_host/input/motion_event_android.h b/content/browser/renderer_host/input/motion_event_android.h
index 0362b0454e997f33d268e6fbd6186bc403ca7ce9..c926372e1355bb672b8c5b45975458f11bdca762 100644
--- a/content/browser/renderer_host/input/motion_event_android.h
+++ b/content/browser/renderer_host/input/motion_event_android.h
@@ -64,6 +64,8 @@ class MotionEventAndroid : public ui::MotionEvent {
                                size_t historical_index) const OVERRIDE;
   virtual float GetHistoricalY(size_t pointer_index,
                                size_t historical_index) const OVERRIDE;
+  virtual int GetSource() const OVERRIDE;
+  virtual int GetButtonState() const OVERRIDE;
   virtual scoped_ptr<MotionEvent> Clone() const OVERRIDE;
   virtual scoped_ptr<MotionEvent> Cancel() const OVERRIDE;