Switch DomAutomationController to be a RenderFrameObserver.

content/browser/frame_host/render_frame_host_impl.cc

Index: content/browser/frame_host/render_frame_host_impl.cc
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index 6d20852679b91953fb07b257f1491168e6dfa1f2..60af38ad931e2f5d9c5961bed38a39368a9b7f0a 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -14,6 +14,7 @@
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/common/frame_messages.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/browser/dom_operation_notification_details.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/user_metrics.h"
@@ -137,6 +138,8 @@ bool RenderFrameHostImpl::OnMessageReceived(const IPC::Message &msg) {
                         OnDidFailLoadWithError)
     IPC_MESSAGE_HANDLER(FrameHostMsg_SwapOut_ACK, OnSwapOutACK)
     IPC_MESSAGE_HANDLER(FrameHostMsg_ContextMenu, OnContextMenu)
+    IPC_MESSAGE_HANDLER(FrameHostMsg_DomOperationResponse,
+                        OnDomOperationResponse)
   IPC_END_MESSAGE_MAP_EX()
 
   if (!msg_is_ok) {
@@ -237,6 +240,12 @@ void RenderFrameHostImpl::OnContextMenu(const ContextMenuParams& params) {
   delegate_->ShowContextMenu(this, validated_params);
 }
 
+void RenderFrameHostImpl::OnDomOperationResponse(const std::string& json_string,
+                                                 int automation_id) {
+  delegate_->OnDomOperationResponse(
+      DomOperationNotificationDetails(json_string, automation_id));
+}
+
 void RenderFrameHostImpl::SetPendingShutdown(const base::Closure& on_swap_out) {
   render_view_host_->SetPendingShutdown(on_swap_out);
 }