cc: Remove all usage of GetArea() from production code in cc

cc/output/software_frame_data.cc

 // Copyright 2013 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/output/software_frame_data.h"
 
 namespace cc {
 
 SoftwareFrameData::SoftwareFrameData()
     : id(0),
       handle(base::SharedMemory::NULLHandle()) {}
 
 SoftwareFrameData::~SoftwareFrameData() {}
 
-size_t SoftwareFrameData::SizeInBytes() const {
-  size_t bytes_per_pixel = 4;
-  size_t width = size.width();
-  size_t height = size.height();
-  return bytes_per_pixel * width * height;
-}
-
-base::CheckedNumeric<size_t> SoftwareFrameData::CheckedSizeInBytes() const {
-  return base::CheckedNumeric<size_t>(4) *
-         base::CheckedNumeric<size_t>(size.width()) *
-         base::CheckedNumeric<size_t>(size.height());
-}
-
 }  // namespace cc