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

content/public/test/render_view_test.h

Index: content/public/test/render_view_test.h
===================================================================
--- content/public/test/render_view_test.h	(revision 163290)
+++ content/public/test/render_view_test.h	(working copy)
@@ -18,9 +18,6 @@
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
 
-class MockRenderProcess;
-class RendererMainPlatformDelegate;
-
 namespace WebKit {
 class WebHistoryItem;
 class WebKitPlatformSupport;
@@ -32,7 +29,8 @@
 }
 
 namespace content {
-
+class MockRenderProcess;
+class RendererMainPlatformDelegate;
 class RendererWebKitPlatformSupportImplNoSandboxImpl;
 
 class RenderViewTest : public testing::Test {