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

chrome/browser/ui/webui/task_manager/task_manager_handler.cc

Index: chrome/browser/ui/webui/task_manager/task_manager_handler.cc
diff --git a/chrome/browser/ui/webui/task_manager/task_manager_handler.cc b/chrome/browser/ui/webui/task_manager/task_manager_handler.cc
index 9c573c2c75bc75a9d2c894a1c854c2479948aee2..3345d2ce4c29284f46633ba83309fe8da63f1930 100644
--- a/chrome/browser/ui/webui/task_manager/task_manager_handler.cc
+++ b/chrome/browser/ui/webui/task_manager/task_manager_handler.cc
@@ -344,7 +344,8 @@ void TaskManagerHandler::EnableTaskManager(const ListValue* indexes) {
 }
 
 void TaskManagerHandler::OpenAboutMemory(const ListValue* indexes) {
-  RenderViewHost* rvh = web_ui()->GetWebContents()->GetRenderViewHost();
+  content::RenderViewHost* rvh =
+      web_ui()->GetWebContents()->GetRenderViewHost();
   if (rvh && rvh->GetDelegate()) {
     WebPreferences webkit_prefs = rvh->GetDelegate()->GetWebkitPrefs();
     webkit_prefs.allow_scripts_to_close_windows = true;