Send screenshots back to the client for debugging

chrome/browser/automation/automation_provider_observers.cc

Index: chrome/browser/automation/automation_provider_observers.cc
diff --git a/chrome/browser/automation/automation_provider_observers.cc b/chrome/browser/automation/automation_provider_observers.cc
index 8f5fc1f0a0faa8dfa104e04eff27a831ca1bd7bd..264c6bf4c530e8ecc39e1b7f8e7d10285d63cf85 100644
--- a/chrome/browser/automation/automation_provider_observers.cc
+++ b/chrome/browser/automation/automation_provider_observers.cc
@@ -1732,9 +1732,13 @@ void PageSnapshotTaker::ExecuteScript(const std::wstring& 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;
 }