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

chrome/browser/tab_contents/render_view_context_menu.cc

Index: chrome/browser/tab_contents/render_view_context_menu.cc
diff --git a/chrome/browser/tab_contents/render_view_context_menu.cc b/chrome/browser/tab_contents/render_view_context_menu.cc
index 2fbe81161cf9a7ccb9a0a926a2fa53e46e4f7157..1b9185af0316e4521f16297f93308bf65328f602 100644
--- a/chrome/browser/tab_contents/render_view_context_menu.cc
+++ b/chrome/browser/tab_contents/render_view_context_menu.cc
@@ -93,6 +93,7 @@ using content::DownloadManager;
 using content::NavigationController;
 using content::NavigationEntry;
 using content::OpenURLParams;
+using content::RenderViewHost;
 using content::SSLStatus;
 using content::UserMetricsAction;
 using content::WebContents;