Switch DomAutomationController to be a RenderFrameObserver.

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index aae7438c44b354b30018895299bfe3f4d123b6ef..b13edca03791cf55a6517d01cbdd5b4a815b1042 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -76,7 +76,6 @@
 #include "content/renderer/browser_plugin/browser_plugin_manager_impl.h"
 #include "content/renderer/devtools/devtools_agent.h"
 #include "content/renderer/disambiguation_popup_helper.h"
-#include "content/renderer/dom_automation_controller.h"
 #include "content/renderer/dom_storage/webstoragenamespace_impl.h"
 #include "content/renderer/drop_data_builder.h"
 #include "content/renderer/external_popup_menu.h"
@@ -3575,9 +3574,6 @@ void RenderViewImpl::didClearWindowObject(WebFrame* frame, int world_id) {
   if (world_id)
     return;
 
-  if (enabled_bindings_ & BINDINGS_POLICY_DOM_AUTOMATION)
-    DomAutomationController::Install(this, frame);
-
   if (enabled_bindings_ & BINDINGS_POLICY_STATS_COLLECTION)
     StatsCollectionController::Install(frame);