Switch DomAutomationController to be a RenderFrameObserver.

chrome/test/base/javascript_test_observer.h

Index: chrome/test/base/javascript_test_observer.h
diff --git a/chrome/test/base/javascript_test_observer.h b/chrome/test/base/javascript_test_observer.h
index 835cc721ddb6aa4362a83e70384ad533ebfdaf0c..a35ea92e4f9e083b86e8fb8ddda4ddb019158f2f 100644
--- a/chrome/test/base/javascript_test_observer.h
+++ b/chrome/test/base/javascript_test_observer.h
@@ -16,7 +16,7 @@ class DictionaryValue;
 }
 
 namespace content {
-class RenderViewHost;
+class WebContents;
 }
 
 // Base class for handling a stream of automation messages produced by a
@@ -61,7 +61,7 @@ class JavascriptTestObserver : public content::NotificationObserver {
   // The observer does not own any arguments passed to it.  It is assumed that
   // the arguments will outlive all uses of the observer.
   JavascriptTestObserver(
-      content::RenderViewHost* render_view_host,
+      content::WebContents* web_contents,
       TestMessageHandler* handler);
 
   virtual ~JavascriptTestObserver();