Fix memory leak in ExtensionWebRequestTest, and remove the suppressions for it.

chrome/browser/extensions/extension_webrequest_api_unittest.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 <queue>
 
 #include "base/file_util.h"
 #include "base/path_service.h"
 
 #include "chrome/browser/extensions/extension_event_router_forwarder.h"
@@ skipping 39 matching lines @@
 
 private:
   // IPC::Message::Sender
   virtual bool Send(IPC::Message* message) {
     EXPECT_EQ(ExtensionMsg_MessageInvoke::ID, message->type());
 
     EXPECT_FALSE(task_queue_.empty());
     MessageLoop::current()->PostTask(FROM_HERE, task_queue_.front());
     task_queue_.pop();
 
-    return false;
+    delete message;
+    return true;
   }
 
   std::queue<Task*> task_queue_;
 };
 
 class ExtensionWebRequestTest : public testing::Test {
 protected:
   virtual void SetUp() {
     event_router_ = new ExtensionEventRouterForwarder();
     enable_referrers_.Init(
@@ skipping 86 matching lines @@
     MessageLoop::current()->Run();
 
     EXPECT_TRUE(!request.is_pending());
     EXPECT_EQ(net::URLRequestStatus::SUCCESS, request.status().status());
     EXPECT_EQ(0, request.status().os_error());
     EXPECT_EQ(redirect_url, request.url());
     EXPECT_EQ(2U, request.url_chain().size());
     EXPECT_EQ(0U, ipc_sender_.GetNumTasks());
   }
 }