Migrate Event API methods to Google Style.

views/controls/scrollbar/bitmap_scroll_bar.cc

 // Copyright (c) 2010 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 "views/controls/scrollbar/bitmap_scroll_bar.h"
 
 #if defined(OS_LINUX)
 #include "views/screen.h"
 #endif
 
@@ skipping 473 matching lines @@
   return true;
 }
 
 void BitmapScrollBar::OnMouseReleased(const MouseEvent& event, bool canceled) {
   SetThumbTrackState(CustomButton::BS_NORMAL);
   repeater_.Stop();
   View::OnMouseReleased(event, canceled);
 }
 
 bool BitmapScrollBar::OnMouseWheel(const MouseWheelEvent& event) {
-  ScrollByContentsOffset(event.GetOffset());
+  ScrollByContentsOffset(event.offset());
   return true;
 }
 
 bool BitmapScrollBar::OnKeyPressed(const KeyEvent& event) {
   ScrollAmount amount = SCROLL_NONE;
-  switch (event.GetKeyCode()) {
+  switch (event.key_code()) {
     case ui::VKEY_UP:
       if (!IsHorizontal())
         amount = SCROLL_PREV_LINE;
       break;
     case ui::VKEY_DOWN:
       if (!IsHorizontal())
         amount = SCROLL_NEXT_LINE;
       break;
     case ui::VKEY_LEFT:
       if (IsHorizontal())
@@ skipping 206 matching lines @@
     thumb_position = thumb_position - (thumb_->GetSize() / 2);
   return (thumb_position * contents_size_) / GetTrackSize();
 }
 
 void BitmapScrollBar::SetThumbTrackState(CustomButton::ButtonState state) {
   thumb_track_state_ = state;
   SchedulePaint();
 }
 
 }  // namespace views