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

chrome/browser/chromeos/login/screen_locker_tester.cc

Index: chrome/browser/chromeos/login/screen_locker_tester.cc
diff --git a/chrome/browser/chromeos/login/screen_locker_tester.cc b/chrome/browser/chromeos/login/screen_locker_tester.cc
index 5e7a9fe2d8b6044c362d42ccd45cf39284333aab..02dfb42b067f9a3271eec106fd83d4a975923f0b 100644
--- a/chrome/browser/chromeos/login/screen_locker_tester.cc
+++ b/chrome/browser/chromeos/login/screen_locker_tester.cc
@@ -180,7 +180,7 @@ views::Widget* WebUIScreenLockerTester::GetChildWidget() const {
 
 base::Value* WebUIScreenLockerTester::ExecuteJavascriptAndGetValue(
     const std::string& js_text) {
-  RenderViewHost* rvh = webui()->GetWebContents()->GetRenderViewHost();
+  content::RenderViewHost* rvh = webui()->GetWebContents()->GetRenderViewHost();
   return rvh->ExecuteJavascriptAndGetValue(string16(),
                                            ASCIIToUTF16(js_text));
 }