Send screenshots back to the client for debugging

chrome/browser/automation/automation_provider_observers.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/automation/automation_provider_observers.h"
 
 #include <deque>
 #include <string>
 #include <vector>
 
@@ skipping 1714 matching lines @@
       reply_message_->routing_id());
 
   render_view_->ExecuteJavascriptInWebFrame(string16(),
                                             WideToUTF16Hack(set_automation_id));
   render_view_->ExecuteJavascriptInWebFrame(string16(),
                                             WideToUTF16Hack(javascript));
 }
 
 void PageSnapshotTaker::SendMessage(bool success) {
   if (automation_) {
-    AutomationMsg_CaptureEntirePageAsPNG::WriteReplyParams(reply_message_.get(),
-                                                           success);
-    automation_->Send(reply_message_.release());
+    if (success) {
+      AutomationJSONReply(automation_, reply_message_.release())
+          .SendSuccess(NULL);
+    } else {
+      AutomationJSONReply(automation_, reply_message_.release())
+          .SendError("Failed to take snapshot of page");
+    }
   }
   delete this;
 }
 
 NTPInfoObserver::NTPInfoObserver(
     AutomationProvider* automation,
     IPC::Message* reply_message,
     CancelableRequestConsumer* consumer)
     : automation_(automation->AsWeakPtr()),
       reply_message_(reply_message),
@@ skipping 392 matching lines @@
           this,
           &WaitForProcessLauncherThreadToGoIdleObserver::RunOnUIThread));
 }
 
 void WaitForProcessLauncherThreadToGoIdleObserver::RunOnUIThread() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   if (automation_)
     automation_->Send(reply_message_.release());
   Release();
 }