Fix GpuProcessTransportFactory destructor crash

content/browser/compositor/gpu_process_transport_factory.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 "content/browser/compositor/gpu_process_transport_factory.h"
 
 #include <string>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 155 matching lines @@
   gpu::SurfaceHandle surface_handle = gpu::kNullSurfaceHandle;
   BrowserCompositorOutputSurface* display_output_surface = nullptr;
   cc::SyntheticBeginFrameSource* begin_frame_source = nullptr;
   ReflectorImpl* reflector = nullptr;
   std::unique_ptr<cc::Display> display;
   bool output_is_secure = false;
   gfx::ColorSpace color_space;
 };
 
 GpuProcessTransportFactory::GpuProcessTransportFactory()
-    : next_surface_client_id_(1u),
-      task_graph_runner_(new cc::SingleThreadTaskGraphRunner),
+    : task_graph_runner_(new cc::SingleThreadTaskGraphRunner),
       callback_factory_(this) {
   cc::SetClientNameForMetrics("Browser");
 
   surface_manager_ = base::WrapUnique(new cc::SurfaceManager);
 
   task_graph_runner_->Start("CompositorTileWorker1",
                             base::SimpleThread::Options());
 #if defined(OS_WIN)
   software_backing_.reset(new OutputDeviceBacking);
 #endif
@@ skipping 686 matching lines @@
       shared_vulkan_context_provider_ =
           cc::VulkanInProcessContextProvider::Create();
     }
 
     shared_vulkan_context_provider_initialized_ = true;
   }
   return shared_vulkan_context_provider_;
 }
 
 }  // namespace content