Move more files into the content namespace.

content/browser/renderer_host/test_backing_store.cc

Index: content/browser/renderer_host/test_backing_store.cc
===================================================================
--- content/browser/renderer_host/test_backing_store.cc	(revision 147462)
+++ content/browser/renderer_host/test_backing_store.cc	(working copy)
@@ -4,7 +4,9 @@
 
 #include "content/browser/renderer_host/test_backing_store.h"
 
-TestBackingStore::TestBackingStore(content::RenderWidgetHost* widget,
+namespace content {
+
+TestBackingStore::TestBackingStore(RenderWidgetHost* widget,
                                    const gfx::Size& size)
     : BackingStore(widget, size) {
 }
@@ -13,7 +15,7 @@
 }
 
 void TestBackingStore::PaintToBackingStore(
-    content::RenderProcessHost* process,
+    RenderProcessHost* process,
     TransportDIB::Id bitmap,
     const gfx::Rect& bitmap_rect,
     const std::vector<gfx::Rect>& copy_rects,
@@ -32,3 +34,5 @@
                                           const gfx::Rect& clip_rect,
                                           const gfx::Size& view_size) {
 }
+
+}  // namespace content