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

[email protected]
BUG=98716

Review URL: https://chromiumcodereview.appspot.com/9600036

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@125388 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/memory_details.cc b/chrome/browser/memory_details.cc
index c5b8a69..3237eb71 100644
--- a/chrome/browser/memory_details.cc
+++ b/chrome/browser/memory_details.cc
@@ -38,6 +38,8 @@
 using content::BrowserChildProcessHostIterator;
 using content::BrowserThread;
 using content::NavigationEntry;
+using content::RenderViewHost;
+using content::RenderWidgetHost;
 using content::WebContents;
 
 // static