Fix use-after-free in TextureLayerImplTest.ResourceNotFreedOnGpuRasterToggle.

cc/layers/texture_layer_impl_unittest.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 "cc/layers/texture_layer_impl.h"
 
 #include <stddef.h>
 
 #include "cc/output/compositor_frame_sink.h"
 #include "cc/output/context_provider.h"
@@ skipping 132 matching lines @@
               impl.quad_list().front()->material);
     const TextureDrawQuad* quad =
         TextureDrawQuad::MaterialCast(impl.quad_list().front());
     EXPECT_TRUE(quad->secure_output_only);
   }
 }
 
 TEST(TextureLayerImplTest, ResourceNotFreedOnGpuRasterToggle) {
   LayerTreeSettings settings;
   settings.gpu_rasterization_enabled = true;
+  bool released = false;
   LayerTestCommon::LayerImplTest impl(settings);
   impl.host_impl()->AdvanceToNextFrame(base::TimeDelta::FromMilliseconds(1));
 
   gfx::Size layer_size(1000, 1000);
   gfx::Size viewport_size(1000, 1000);
 
   gpu::Mailbox mailbox;
   impl.compositor_frame_sink()
       ->context_provider()
       ->ContextGL()
       ->GenMailboxCHROMIUM(mailbox.name);
   TextureMailbox texture_mailbox(
       mailbox,
       gpu::SyncToken(gpu::CommandBufferNamespace::GPU_IO, 0x123,
                      gpu::CommandBufferId::FromUnsafeValue(0x234), 0x456),
       GL_TEXTURE_2D);
 
   TextureLayerImpl* texture_layer_impl =
       impl.AddChildToRoot<TextureLayerImpl>();
   texture_layer_impl->SetBounds(layer_size);
   texture_layer_impl->SetDrawsContent(true);
-  bool released = false;
   texture_layer_impl->SetTextureMailbox(
       texture_mailbox,
       SingleReleaseCallbackImpl::Create(base::Bind(
           [](bool* released, const gpu::SyncToken& sync_token, bool lost,
              BlockingTaskRunner* main_thread_task_runner) { *released = true; },
           base::Unretained(&released))));
 
   impl.CalcDrawProps(viewport_size);
 
   // Gpu rasterization is disabled by default.
   EXPECT_FALSE(impl.host_impl()->use_gpu_rasterization());
   EXPECT_FALSE(released);
   // Toggling the gpu rasterization clears all tilings on both trees.
   impl.host_impl()->SetHasGpuRasterizationTrigger(true);
   impl.host_impl()->SetContentIsSuitableForGpuRasterization(true);
   impl.host_impl()->CommitComplete();
   EXPECT_TRUE(impl.host_impl()->use_gpu_rasterization());
   EXPECT_FALSE(released);
 }
 
 }  // namespace
 }  // namespace cc