Re-land:

chrome/browser/ui/views/tab_contents/native_tab_contents_view_delegate.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_TAB_CONTENTS_NATIVE_TAB_CONTENTS_VIEW_DELEGATE_H_
 #define CHROME_BROWSER_UI_VIEWS_TAB_CONTENTS_NATIVE_TAB_CONTENTS_VIEW_DELEGATE_H_
 #pragma once
 
 class TabContents;
-namespace gfx{
+namespace gfx {
 class Size;
 }
+namespace views {
+namespace internal {
+class NativeWidgetDelegate;
+}
+}
 
 namespace internal {
 
 class NativeTabContentsViewDelegate {
  public:
   virtual ~NativeTabContentsViewDelegate() {}
 
   virtual TabContents* GetTabContents() = 0;
 
   // TODO(beng):
   // This can die with OnNativeTabContentsViewMouseDown/Move().
   virtual bool IsShowingSadTab() const = 0;
 
   // TODO(beng):
   // These three can be replaced by Widget::OnSizeChanged and some new
   // notifications for show/hide.
   virtual void OnNativeTabContentsViewShown() = 0;
   virtual void OnNativeTabContentsViewHidden() = 0;
   virtual void OnNativeTabContentsViewSized(const gfx::Size& size) = 0;
 
-  virtual void OnNativeTabContentsViewWheelZoom(int distance) = 0;
+  virtual void OnNativeTabContentsViewWheelZoom(bool zoom_in) = 0;
 
   // TODO(beng):
   // These two can be replaced by an override of Widget::OnMouseEvent.
   virtual void OnNativeTabContentsViewMouseDown() = 0;
-  virtual void OnNativeTabContentsViewMouseMove() = 0;
+  virtual void OnNativeTabContentsViewMouseMove(bool motion) = 0;
 
   virtual void OnNativeTabContentsViewDraggingEnded() = 0;
+
+  virtual views::internal::NativeWidgetDelegate* AsNativeWidgetDelegate() = 0;
 };
 
 }  // namespace internal
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TAB_CONTENTS_NATIVE_TAB_CONTENTS_VIEW_DELEGATE_H_