cc: Set ui/gpu/cc/ipc/upload/raster thread priorities.

cc/raster_worker_pool.cc

 // Copyright 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 "cc/raster_worker_pool.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "base/stl_util.h"
 #include "base/stringprintf.h"
 #include "cc/picture_pile_impl.h"
 #include "third_party/skia/include/core/SkDevice.h"
 
+#if defined(OS_ANDROID)
+// TODO(epenner): Move thread priorities to base. (crbug.com/170549)
+#include <sys/resource.h>
+#endif
+
 namespace cc {
 
 namespace {
 
 void RunRasterTask(PicturePileImpl* picture_pile,
                    uint8* buffer,
                    const gfx::Rect& rect,
                    float contents_scale,
                    RenderingStats* stats) {
   TRACE_EVENT0("cc", "RunRasterTask");
@@ skipping 44 matching lines @@
 RasterWorkerPool::Thread::Thread(const std::string name)
     : base::Thread(name.c_str()),
       num_pending_tasks_(0) {
   Start();
 }
 
 RasterWorkerPool::Thread::~Thread() {
   Stop();
 }
 
+void RasterWorkerPool::Thread::Init() {
+#if defined(OS_ANDROID)
+  // TODO(epenner): Move thread priorities to base. (crbug.com/170549)
+  int nice_value = 10; // Idle priority.
+  setpriority(PRIO_PROCESS, base::PlatformThread::CurrentId(), nice_value);
+#endif
+}
+
 RasterWorkerPool::RasterWorkerPool(size_t num_raster_threads) {
   const std::string thread_name_prefix = kRasterThreadNamePrefix;
   while (raster_threads_.size() < num_raster_threads) {
     int thread_number = raster_threads_.size() + 1;
     raster_threads_.push_back(
         new Thread(thread_name_prefix +
                    StringPrintf("Worker%d", thread_number).c_str()));
   }
 }
 
@@ skipping 87 matching lines @@
 }
 
 void RasterWorkerPool::OnRasterTaskCompleted(
     Thread::Task* task,
     scoped_refptr<PicturePileImpl> picture_pile,
     const base::Closure& reply) {
   OnTaskCompleted(task, reply);
 }
 
 }  // namespace cc