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

content/browser/renderer_host/input/motion_event_web.h

Index: content/browser/renderer_host/input/motion_event_web.h
diff --git a/content/browser/renderer_host/input/motion_event_web.h b/content/browser/renderer_host/input/motion_event_web.h
index f4ae25890fe3fcfcacae1da31945aafea6dde120..467cdc8dcd8078362476fd42a0096c1d43ea90b1 100644
--- a/content/browser/renderer_host/input/motion_event_web.h
+++ b/content/browser/renderer_host/input/motion_event_web.h
@@ -41,6 +41,8 @@ class MotionEventWeb : public ui::MotionEvent {
   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;