Put the Pepper stuff in the content namespace.

content/renderer/pepper/pepper_platform_image_2d_impl.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/pepper/pepper_platform_image_2d_impl.h"
 
 #include "build/build_config.h"
 #include "content/common/view_messages.h"
 #include "content/renderer/render_thread_impl.h"
 #include "ui/gfx/surface/transport_dib.h"
 
+namespace content {
+
 PepperPlatformImage2DImpl::PepperPlatformImage2DImpl(int width,
                                                      int height,
                                                      TransportDIB* dib)
     : width_(width),
       height_(height),
       dib_(dib) {
 }
 
 // On Mac, we have to tell the browser to free the transport DIB.
 PepperPlatformImage2DImpl::~PepperPlatformImage2DImpl() {
@@ skipping 51 matching lines @@
 #elif defined(OS_MACOSX) || defined(OS_ANDROID)
   return static_cast<intptr_t>(dib_->handle().fd);
 #elif defined(OS_POSIX)
   return static_cast<intptr_t>(dib_->handle());
 #endif
 }
 
 TransportDIB* PepperPlatformImage2DImpl::GetTransportDIB() const {
   return dib_.get();
 }
+
+}  // namespace content