Move Render(View|Widget)Host and associated classes to content namespace.

content/browser/tab_contents/tab_contents_unittest.cc

Index: content/browser/tab_contents/tab_contents_unittest.cc
diff --git a/content/browser/tab_contents/tab_contents_unittest.cc b/content/browser/tab_contents/tab_contents_unittest.cc
index 57c4844068845cbcf9f02bccba196e3dba01fd54..f36cb80fbb2209874c4962e44d1918710888d51f 100644
--- a/content/browser/tab_contents/tab_contents_unittest.cc
+++ b/content/browser/tab_contents/tab_contents_unittest.cc
@@ -33,6 +33,7 @@ using content::InterstitialPage;
 using content::NavigationEntry;
 using content::NavigationEntryImpl;
 using content::SiteInstance;
+using content::TestRenderViewHost;
 using content::WebContents;
 using content::WebUI;
 using content::WebUIController;
@@ -201,7 +202,7 @@ class TestInterstitialPage : public InterstitialPageImpl {
   }
 
  protected:
-  virtual RenderViewHost* CreateRenderViewHost() OVERRIDE {
+  virtual content::RenderViewHost* CreateRenderViewHost() OVERRIDE {
     return new TestRenderViewHost(
         SiteInstance::Create(tab()->GetBrowserContext()),
         this, MSG_ROUTING_NONE);