gpu: Fix some context lost marking glitches+leaks and add UMA stats

content/browser/gpu/gpu_ipc_browsertests.cc

 // Copyright 2013 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/command_line.h"
 #include "base/run_loop.h"
 #include "content/browser/gpu/browser_gpu_channel_host_factory.h"
 #include "content/browser/gpu/gpu_process_host_ui_shim.h"
 #include "content/common/gpu/client/context_provider_command_buffer.h"
 #include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
@@ skipping 191 matching lines @@
 #define MAYBE_CrashAndRecover DISABLED_CrashAndRecover
 #endif
 IN_PROC_BROWSER_TEST_F(BrowserGpuChannelHostFactoryTest,
                        MAYBE_CrashAndRecover) {
   DCHECK(!IsChannelEstablished());
   EstablishAndWait();
   scoped_refptr<GpuChannelHost> host = GetGpuChannel();
 
   scoped_refptr<ContextProviderCommandBuffer> provider =
       ContextProviderCommandBuffer::Create(CreateContext(),
-                                           "BrowserGpuChannelHostFactoryTest");
+                                           OFFSCREEN_CONTEXT_FOR_TESTING);
   base::RunLoop run_loop;
   int counter = 0;
   provider->SetLostContextCallback(
       base::Bind(&BrowserGpuChannelHostFactoryTest::OnContextLost,
                  base::Unretained(this), run_loop.QuitClosure(), &counter));
   EXPECT_TRUE(provider->BindToCurrentThread());
   GpuProcessHostUIShim* shim =
       GpuProcessHostUIShim::FromID(GetFactory()->GpuProcessHostId());
   EXPECT_TRUE(shim != NULL);
   shim->SimulateCrash();
   run_loop.Run();
 
   EXPECT_EQ(1, counter);
   EXPECT_FALSE(IsChannelEstablished());
   EstablishAndWait();
   EXPECT_TRUE(IsChannelEstablished());
 }
 
 }  // namespace content