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

content/common/gpu/stream_texture_manager_android.h

Index: content/common/gpu/stream_texture_manager_android.h
===================================================================
--- content/common/gpu/stream_texture_manager_android.h	(revision 163290)
+++ content/common/gpu/stream_texture_manager_android.h	(working copy)
@@ -13,7 +13,6 @@
 #include "gpu/command_buffer/service/stream_texture.h"
 #include "gpu/command_buffer/service/stream_texture_manager.h"
 
-class GpuChannel;
 struct GpuStreamTextureMsg_MatrixChanged_Params;
 
 namespace gfx {
@@ -21,6 +20,7 @@
 }
 
 namespace content {
+class GpuChannel;
 
 class SurfaceTextureBridge;