content: Improve thread priority for raster threads.

content/renderer/gpu/compositor_output_surface.cc

 // 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.
 
 #include "content/renderer/gpu/compositor_output_surface.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/location.h"
@@ skipping 27 matching lines @@
     bool use_swap_compositor_frame_message)
     : OutputSurface(context_provider,
                     worker_context_provider,
                     std::move(software_device)),
       output_surface_id_(output_surface_id),
       use_swap_compositor_frame_message_(use_swap_compositor_frame_message),
       output_surface_filter_(RenderThreadImpl::current()
                                  ->compositor_message_filter()),
       frame_swap_message_queue_(swap_frame_message_queue),
       routing_id_(routing_id),
-#if defined(OS_ANDROID)
-      prefers_smoothness_(false),
-      main_thread_runner_(base::MessageLoop::current()->task_runner()),
-#endif
       layout_test_mode_(RenderThreadImpl::current()->layout_test_mode()),
       weak_ptrs_(this) {
   DCHECK(output_surface_filter_.get());
   DCHECK(frame_swap_message_queue_.get());
   message_sender_ = RenderThreadImpl::current()->sync_message_filter();
   DCHECK(message_sender_.get());
 }
 
 CompositorOutputSurface::~CompositorOutputSurface() {}
 
@@ skipping 17 matching lines @@
         gpu::MemoryAllocation::CUTOFF_ALLOW_NICE_TO_HAVE,
         base::SharedMemory::GetHandleLimit() / 3));
   }
 
   return true;
 }
 
 void CompositorOutputSurface::DetachFromClient() {
   if (!HasClient())
     return;
-  UpdateSmoothnessTakesPriority(false);
   if (output_surface_proxy_.get())
     output_surface_proxy_->ClearOutputSurface();
   output_surface_filter_->RemoveHandlerOnCompositorThread(
       routing_id_, output_surface_filter_handler_);
   cc::OutputSurface::DetachFromClient();
 }
 
 void CompositorOutputSurface::ShortcutSwapAck(
     uint32_t output_surface_id,
     scoped_ptr<cc::GLFrameData> gl_frame_data) {
@@ skipping 95 matching lines @@
   // (e.g. after a lost context).
   if (output_surface_id != output_surface_id_)
     return;
   ReclaimResources(&ack);
 }
 
 bool CompositorOutputSurface::Send(IPC::Message* message) {
   return message_sender_->Send(message);
 }
 
-#if defined(OS_ANDROID)
-namespace {
-void SetThreadPriorityToIdle() {
-  base::PlatformThread::SetCurrentThreadPriority(
-      base::ThreadPriority::BACKGROUND);
-}
-void SetThreadPriorityToDefault() {
-  base::PlatformThread::SetCurrentThreadPriority(base::ThreadPriority::NORMAL);
-}
-}  // namespace
-#endif
-
-void CompositorOutputSurface::UpdateSmoothnessTakesPriority(
-    bool prefers_smoothness) {
-#if defined(OS_ANDROID)
-  if (prefers_smoothness_ == prefers_smoothness)
-    return;
-  prefers_smoothness_ = prefers_smoothness;
-  if (prefers_smoothness) {
-    main_thread_runner_->PostTask(FROM_HERE,
-                                  base::Bind(&SetThreadPriorityToIdle));
-  } else {
-    main_thread_runner_->PostTask(FROM_HERE,
-                                  base::Bind(&SetThreadPriorityToDefault));
-  }
-#endif
-}
-
 }  // namespace content