Don't drop messages/events send to a service worker that is stopping.

content/browser/service_worker/service_worker_browsertest.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 "base/bind.h"
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/run_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/browser/fileapi/chrome_blob_storage_context.h"
@@ skipping 358 matching lines @@
   }
 
  protected:
   // EmbeddedWorkerInstance::Observer overrides:
   void OnStarted() override {
     ASSERT_TRUE(worker_ != NULL);
     ASSERT_FALSE(done_closure_.is_null());
     last_worker_status_ = worker_->status();
     BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, done_closure_);
   }
-  void OnStopped() override {
+  void OnStopped(EmbeddedWorkerInstance::Status old_status) override {
     ASSERT_TRUE(worker_ != NULL);
     ASSERT_FALSE(done_closure_.is_null());
     last_worker_status_ = worker_->status();
     BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, done_closure_);
   }
   void OnPausedAfterDownload() override {
     if (pause_mode_ == PAUSE_THEN_RESUME)
       worker_->ResumeAfterDownload();
     else if (pause_mode_ == PAUSE_THEN_STOP)
       worker_->Stop();
@@ skipping 551 matching lines @@
     RunOnIOThread(
         base::Bind(&ServiceWorkerBlackBoxBrowserTest::FindRegistrationOnIO,
                    this,
                    embedded_test_server()->GetURL("/service_worker/empty.html"),
                    &status));
     EXPECT_EQ(SERVICE_WORKER_ERROR_NOT_FOUND, status);
   }
 }
 
 }  // namespace content