Add UMA histograms and logging for bad IPC message handling

extensions/browser/extension_host.cc

 // Copyright 2014 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 "extensions/browser/extension_host.h"
 
 #include "base/logging.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/profiler/scoped_tracker.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
+#include "content/public/browser/bad_message.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/native_web_keyboard_event.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/site_instance.h"
 #include "content/public/browser/web_contents.h"
 #include "extensions/browser/event_router.h"
@@ skipping 337 matching lines @@
   // This way if a renderer _is_ compromised, it can really only affect itself.
   if (unacked_messages_.erase(event_id) > 0) {
     FOR_EACH_OBSERVER(ExtensionHostObserver, observer_list_,
                       OnBackgroundEventAcked(this, event_id));
   } else {
     // We have received an unexpected event id from the renderer.  It might be
     // compromised or it might have some other issue.  Kill it just to be safe.
     DCHECK(render_process_host());
     LOG(ERROR) << "Killing renderer for extension " << extension_id() << " for "
                << "sending an EventAck message with a bad event id.";
-    render_process_host()->ReceivedBadMessage();
+    render_process_host()->ReceivedBadMessage(
+        content::BadMessage::EH_BAD_EVENT_ID);
   }
 }
 
 void ExtensionHost::OnIncrementLazyKeepaliveCount() {
   ProcessManager::Get(browser_context_)
       ->IncrementLazyKeepaliveCount(extension());
 }
 
 void ExtensionHost::OnDecrementLazyKeepaliveCount() {
   ProcessManager::Get(browser_context_)
@@ skipping 74 matching lines @@
   return delegate_->CheckMediaAccessPermission(
       web_contents, security_origin, type, extension());
 }
 
 bool ExtensionHost::IsNeverVisible(content::WebContents* web_contents) {
   ViewType view_type = extensions::GetViewType(web_contents);
   return view_type == extensions::VIEW_TYPE_EXTENSION_BACKGROUND_PAGE;
 }
 
 }  // namespace extensions