Move a bunch of code in content\common (as well as a few left in renderer) to the content namespace.

content/browser/renderer_host/image_transport_factory_android.h

Index: content/browser/renderer_host/image_transport_factory_android.h
===================================================================
--- content/browser/renderer_host/image_transport_factory_android.h	(revision 163290)
+++ content/browser/renderer_host/image_transport_factory_android.h	(working copy)
@@ -8,10 +8,9 @@
 #include "base/memory/scoped_ptr.h"
 #include "ui/gfx/native_widget_types.h"
 
+namespace content {
 class WebGraphicsContext3DCommandBufferImpl;
 
-namespace content {
-
 class ImageTransportFactoryAndroid {
  public:
   ImageTransportFactoryAndroid();