Fix a race condition when an IconAnimation is still running at browser shutdown.

chrome/browser/extensions/script_badge_controller.cc

 // Copyright (c) 2012 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/extensions/script_badge_controller.h"
 
 #include "chrome/browser/extensions/browser_event_router.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/extensions/tab_helper.h"
@@ skipping 168 matching lines @@
   current_actions_.push_back(script_badge);
   return script_badge;
 }
 
 bool ScriptBadgeController::MarkExtensionExecuting(
     const std::string& extension_id) {
   ExtensionAction* script_badge = AddExtensionToCurrentActions(extension_id);
   if (!script_badge)
     return false;
 
+  script_badge->SetIsVisible(SessionID::IdForTab(tab_contents_), true);
   script_badge->RunIconAnimation(SessionID::IdForTab(tab_contents_));
 
   return true;
 }
 
 bool ScriptBadgeController::EraseExtension(const Extension* extension) {
   if (extensions_in_current_actions_.erase(extension->id()) == 0)
     return false;
 
   size_t size_before = current_actions_.size();
@@ skipping 10 matching lines @@
       current_actions_.erase(it);
       break;
     }
   }
 
   CHECK_EQ(size_before, current_actions_.size() + 1);
   return true;
 }
 
 }  // namespace extensions