Move RenderWidgetHostView into content namespace. Fix include paths.

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

Index: chrome/browser/ui/views/tab_contents/native_tab_contents_view.h
diff --git a/chrome/browser/ui/views/tab_contents/native_tab_contents_view.h b/chrome/browser/ui/views/tab_contents/native_tab_contents_view.h
index 905e141e0cfce95700a20cbddba96dbf5e19c09c..d76e6a6e974a187aa5a79ca75b88b9b35ae1b413 100644
--- a/chrome/browser/ui/views/tab_contents/native_tab_contents_view.h
+++ b/chrome/browser/ui/views/tab_contents/native_tab_contents_view.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 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.
 
@@ -13,8 +13,10 @@
 #include "ui/gfx/native_widget_types.h"
 
 class RenderWidgetHost;
-class RenderWidgetHostView;
 struct WebDropData;
+namespace content {
+class RenderWidgetHostView;
+}
 namespace gfx {
 class Point;
 }
@@ -36,7 +38,7 @@ class NativeTabContentsView {
 
   virtual void Unparent() = 0;
 
-  virtual RenderWidgetHostView* CreateRenderWidgetHostView(
+  virtual content::RenderWidgetHostView* CreateRenderWidgetHostView(
       RenderWidgetHost* render_widget_host) = 0;
 
   virtual gfx::NativeWindow GetTopLevelNativeWindow() const = 0;