Remove image_decode_tasks_enabled flag.

content/renderer/render_thread_impl.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
 #define CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 222 matching lines @@
   bool IsPartialRasterEnabled() override;
   bool IsGpuMemoryBufferCompositorResourcesEnabled() override;
   bool IsElasticOverscrollEnabled() override;
   const cc::BufferToTextureTargetMap& GetBufferToTextureTargetMap() override;
   scoped_refptr<base::SingleThreadTaskRunner>
   GetCompositorMainThreadTaskRunner() override;
   scoped_refptr<base::SingleThreadTaskRunner>
   GetCompositorImplThreadTaskRunner() override;
   blink::scheduler::RendererScheduler* GetRendererScheduler() override;
   cc::TaskGraphRunner* GetTaskGraphRunner() override;
-  bool AreImageDecodeTasksEnabled() override;
   bool IsThreadedAnimationEnabled() override;
   bool IsScrollAnimatorEnabled() override;
   bool IsSurfaceSynchronizationEnabled() override;
 
   // blink::scheduler::RendererScheduler::RAILModeObserver implementation.
   void OnRAILModeChanged(v8::RAILMode rail_mode) override;
 
   // Synchronously establish a channel to the GPU plugin if not previously
   // established or if it has been lost (for example if the GPU plugin crashed).
   // If there is a pending asynchronous request, it will be completed by the
@@ skipping 475 matching lines @@
   bool is_gpu_rasterization_forced_;
   bool is_async_worker_context_enabled_;
   int gpu_rasterization_msaa_sample_count_;
   bool is_lcd_text_enabled_;
   bool is_distance_field_text_enabled_;
   bool is_zero_copy_enabled_;
   bool is_gpu_memory_buffer_compositor_resources_enabled_;
   bool is_partial_raster_enabled_;
   bool is_elastic_overscroll_enabled_;
   cc::BufferToTextureTargetMap buffer_to_texture_target_map_;
-  bool are_image_decode_tasks_enabled_;
   bool is_threaded_animation_enabled_;
   bool is_scroll_animator_enabled_;
   bool is_surface_synchronization_enabled_;
 
   class PendingFrameCreate : public base::RefCounted<PendingFrameCreate> {
    public:
     PendingFrameCreate(
         int routing_id,
         mojom::FrameRequest frame_request,
         mojom::FrameHostInterfaceBrokerPtr frame_host_interface_broker);
@@ skipping 45 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(RenderThreadImpl);
 };
 
 #if defined(COMPILER_MSVC)
 #pragma warning(pop)
 #endif
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_THREAD_IMPL_H_