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() {
-  DCHECK(!did_schedule_);
-  DCHECK(!did_run_ || did_complete_);
-}
-
-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() {
-}
-
-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