Move a bunch of code in content\renderer to the content namespace.

content/renderer/idle_user_detector.cc

Index: content/renderer/idle_user_detector.cc
===================================================================
--- content/renderer/idle_user_detector.cc	(revision 163045)
+++ content/renderer/idle_user_detector.cc	(working copy)
@@ -9,8 +9,10 @@
 #include "content/public/renderer/content_renderer_client.h"
 #include "content/renderer/render_thread_impl.h"
 
-IdleUserDetector::IdleUserDetector(content::RenderView* render_view)
-    : content::RenderViewObserver(render_view){
+namespace content {
+
+IdleUserDetector::IdleUserDetector(RenderView* render_view)
+    : RenderViewObserver(render_view){
 }
 
 IdleUserDetector::~IdleUserDetector() {
@@ -24,11 +26,12 @@
 }
 
 void IdleUserDetector::OnHandleInputEvent(const IPC::Message& message) {
-  if (content::GetContentClient()->renderer()->
-          RunIdleHandlerWhenWidgetsHidden()) {
+  if (GetContentClient()->renderer()->RunIdleHandlerWhenWidgetsHidden()) {
     RenderThreadImpl* render_thread = RenderThreadImpl::current();
     if (render_thread != NULL) {
       render_thread->PostponeIdleNotification();
     }
   }
 }
+
+}  // namespace content