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

content/browser/renderer_host/input/motion_event_android.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/input/motion_event_android.h"
 
 #include "base/android/jni_android.h"
 #include "jni/MotionEvent_jni.h"
 
 using base::android::AttachCurrentThread;
@@ skipping 240 matching lines @@
   return ToDips(Java_MotionEvent_getHistoricalXF_I_I(
       AttachCurrentThread(), event_.obj(), pointer_index, historical_index));
 }
 
 float MotionEventAndroid::GetHistoricalY(size_t pointer_index,
                                          size_t historical_index) const {
   return ToDips(Java_MotionEvent_getHistoricalYF_I_I(
       AttachCurrentThread(), event_.obj(), pointer_index, historical_index));
 }
 
+int MotionEventAndroid::GetSource() const {
+  return Java_MotionEvent_getSource(AttachCurrentThread(), event_.obj());
+}
+
+int MotionEventAndroid::GetButtonState() const {
+  return Java_MotionEvent_getButtonState(AttachCurrentThread(), event_.obj());
+}
+
 scoped_ptr<ui::MotionEvent> MotionEventAndroid::Clone() const {
   return scoped_ptr<MotionEvent>(new MotionEventAndroid(*this));
 }
 
 scoped_ptr<ui::MotionEvent> MotionEventAndroid::Cancel() const {
   // The input coordinates to |MotionEventAndroid| are always in device pixels,
   // but the cached coordinates are in DIPs.
   const gfx::PointF position_pixels =
       gfx::ScalePoint(cached_positions_[0], 1.f / pix_to_dip_);
   return scoped_ptr<MotionEvent>(
@@ skipping 50 matching lines @@
   return Java_MotionEvent_obtainAVME_J_J_I_F_F_I(AttachCurrentThread(),
                                                  ToAndroidTime(down_time),
                                                  ToAndroidTime(event_time),
                                                  ToAndroidAction(action),
                                                  x_pixels,
                                                  y_pixels,
                                                  0);
 }
 
 }  // namespace content