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

content/browser/renderer_host/render_view_host_impl.cc

Index: content/browser/renderer_host/render_view_host_impl.cc
diff --git a/content/browser/renderer_host/render_view_host_impl.cc b/content/browser/renderer_host/render_view_host_impl.cc
index 2c5b0248ac0ca691f5a1fdab1fb590a6eb4604d1..302ea48cf2e16bf74de00aacca12fabe75dea924 100644
--- a/content/browser/renderer_host/render_view_host_impl.cc
+++ b/content/browser/renderer_host/render_view_host_impl.cc
@@ -61,16 +61,6 @@
 #include "webkit/glue/webdropdata.h"
 
 using base::TimeDelta;
-using content::BrowserContext;
-using content::BrowserMessageFilter;
-using content::BrowserThread;
-using content::DomOperationNotificationDetails;
-using content::DOMStorageContext;
-using content::HostZoomMap;
-using content::RenderViewHostDelegate;
-using content::SessionStorageNamespace;
-using content::SiteInstance;
-using content::UserMetricsAction;
 using WebKit::WebConsoleMessage;
 using WebKit::WebDragOperation;
 using WebKit::WebDragOperationNone;
@@ -100,14 +90,15 @@ base::i18n::TextDirection WebTextDirectionToChromeTextDirection(
 
 }  // namespace
 
+namespace content {
+
 ///////////////////////////////////////////////////////////////////////////////
 // RenderViewHost, public:
 
 // static
 RenderViewHost* RenderViewHost::FromID(int render_process_id,
                                        int render_view_id) {
-  content::RenderProcessHost* process =
-      content::RenderProcessHost::FromID(render_process_id);
+  RenderProcessHost* process = RenderProcessHost::FromID(render_process_id);
   if (!process)
     return NULL;
   RenderWidgetHost* widget = RenderWidgetHost::FromIPCChannelListener(
@@ -1669,3 +1660,5 @@ void RenderViewHostImpl::SetSwappedOut(bool is_swapped_out) {
 void RenderViewHostImpl::ClearPowerSaveBlockers() {
   STLDeleteValues(&power_save_blockers_);
 }
+
+}  // namespace content