Put the Pepper stuff in the content namespace.

content/renderer/pepper/pepper_platform_video_capture_impl.h

 // 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.
 
 #ifndef CONTENT_RENDERER_PEPPER_PEPPER_PLATFORM_VIDEO_CAPTURE_IMPL_H_
 #define CONTENT_RENDERER_PEPPER_PEPPER_PLATFORM_VIDEO_CAPTURE_IMPL_H_
 #pragma once
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "media/video/capture/video_capture.h"
 #include "webkit/plugins/ppapi/plugin_delegate.h"
 
-class PepperPluginDelegateImpl;
-
 namespace media {
 class VideoCaptureHandlerProxy;
 }
 
+namespace content {
+
+class PepperPluginDelegateImpl;
+
 class PepperPlatformVideoCaptureImpl
     : public webkit::ppapi::PluginDelegate::PlatformVideoCapture,
       public media::VideoCapture::EventHandler {
  public:
   PepperPlatformVideoCaptureImpl(
       const base::WeakPtr<PepperPluginDelegateImpl>& plugin_delegate,
       const std::string& device_id,
       webkit::ppapi::PluginDelegate::PlatformVideoCaptureEventHandler* handler);
   virtual ~PepperPlatformVideoCaptureImpl();
 
@@ skipping 39 matching lines @@
 
   media::VideoCapture* video_capture_;
 
   // StartCapture() must be balanced by StopCapture(), otherwise this object
   // will leak.
   bool unbalanced_start_;
 
   DISALLOW_COPY_AND_ASSIGN(PepperPlatformVideoCaptureImpl);
 };
 
+}  // namespace content
+
 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_PLATFORM_VIDEO_CAPTURE_IMPL_H_