Put the Pepper stuff in the content namespace.

content/renderer/render_widget_fullscreen_pepper.cc

 // 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.
 
 #include "content/renderer/render_widget_fullscreen_pepper.h"
 
 #include "base/bind.h"
 #include "base/message_loop.h"
 #include "content/common/gpu/client/gpu_channel_host.h"
 #include "content/common/view_messages.h"
@@ skipping 260 matching lines @@
 }
 
 void RenderWidgetFullscreenPepper::DidChangeCursor(
     const WebKit::WebCursorInfo& cursor) {
   didChangeCursor(cursor);
 }
 
 webkit::ppapi::PluginDelegate::PlatformContext3D*
 RenderWidgetFullscreenPepper::CreateContext3D() {
 #ifdef ENABLE_GPU
-  return new PlatformContext3DImpl(this);
+  return new content::PlatformContext3DImpl(this);
 #else
   return NULL;
 #endif
 }
 
 void RenderWidgetFullscreenPepper::WillInitiatePaint() {
   if (plugin_)
     plugin_->ViewWillInitiatePaint();
 }
 
@@ skipping 231 matching lines @@
 
 ContentGLContext*
 RenderWidgetFullscreenPepper::GetParentContextForPlatformContext3D() {
   if (!context_) {
     CreateContext();
   }
   if (!context_)
     return NULL;
   return context_;
 }