cc: Simplify Task and its derived classes.

cc/raster/tile_task_runner.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/raster/tile_task_runner.h"
 #include "cc/resources/platform_color.h"
 
 namespace cc {
 
-TileTask::TileTask() : did_schedule_(false), did_complete_(false) {
-}
+TileTask::TileTask(bool supports_concurrent_execution)
+    : supports_concurrent_execution_(supports_concurrent_execution),
+      did_schedule_(false),
+      did_complete_(false) {}
+
+TileTask::TileTask(bool supports_concurrent_execution,
+                   TileTask::Vector* dependencies)
+    : supports_concurrent_execution_(supports_concurrent_execution),
+      dependencies_(std::move(*dependencies)),
+      did_schedule_(false),
+      did_complete_(false) {}
 
 TileTask::~TileTask() {
   DCHECK(!did_schedule_);
   DCHECK(!did_run_ || did_complete_);
 }
 
+bool TileTask::SupportsConcurrentExecution() const {
+  return supports_concurrent_execution_;
+}
+
 void TileTask::WillSchedule() {
   DCHECK(!did_schedule_);
 }
 
 void TileTask::DidSchedule() {
   did_schedule_ = true;
   did_complete_ = false;
 }
 
 bool TileTask::HasBeenScheduled() const {
   return did_schedule_;
 }
 
 void TileTask::WillComplete() {
   DCHECK(!did_complete_);
 }
 
 void TileTask::DidComplete() {
   DCHECK(did_schedule_);
   DCHECK(!did_complete_);
   did_schedule_ = false;
   did_complete_ = true;
 }
 
 bool TileTask::HasCompleted() const {
   return did_complete_;
 }
 
-ImageDecodeTask::ImageDecodeTask() {
-}
-
-ImageDecodeTask::ImageDecodeTask(scoped_refptr<ImageDecodeTask> dependency)
-    : dependency_(std::move(dependency)) {}
-
-ImageDecodeTask::~ImageDecodeTask() {
-}
-
-bool ImageDecodeTask::SupportsConcurrentExecution() const {
-  return true;
-}
-
-RasterTask::RasterTask(ImageDecodeTask::Vector* dependencies) {
-  dependencies_.swap(*dependencies);
-}
-
-RasterTask::~RasterTask() {
-}
-
 bool TileTaskRunner::ResourceFormatRequiresSwizzle(ResourceFormat format) {
   switch (format) {
     case RGBA_8888:
     case BGRA_8888:
       // Initialize resource using the preferred PlatformColor component
       // order and swizzle in the shader instead of in software.
       return !PlatformColor::SameComponentOrder(format);
     case RGBA_4444:
     case ETC1:
     case ALPHA_8:
     case LUMINANCE_8:
     case RGB_565:
     case RED_8:
     case LUMINANCE_F16:
       return false;
   }
   NOTREACHED();
   return false;
 }
 
 }  // namespace cc