Move more files into the content namespace.

content/browser/renderer_host/test_backing_store.h

Index: content/browser/renderer_host/test_backing_store.h
===================================================================
--- content/browser/renderer_host/test_backing_store.h	(revision 147462)
+++ content/browser/renderer_host/test_backing_store.h	(working copy)
@@ -9,14 +9,16 @@
 #include "base/compiler_specific.h"
 #include "content/browser/renderer_host/backing_store.h"
 
+namespace content {
+
 class TestBackingStore : public BackingStore {
  public:
-  TestBackingStore(content::RenderWidgetHost* widget, const gfx::Size& size);
+  TestBackingStore(RenderWidgetHost* widget, const gfx::Size& size);
   virtual ~TestBackingStore();
 
   // BackingStore implementation.
   virtual void PaintToBackingStore(
-      content::RenderProcessHost* process,
+      RenderProcessHost* process,
       TransportDIB::Id bitmap,
       const gfx::Rect& bitmap_rect,
       const std::vector<gfx::Rect>& copy_rects,
@@ -32,4 +34,6 @@
   DISALLOW_COPY_AND_ASSIGN(TestBackingStore);
 };
 
+}  // namespace content
+
 #endif  // CONTENT_BROWSER_RENDERER_HOST_TEST_TEST_BACKING_STORE_H_