Simplify IOSurface CoreAnimation code: Part 2

content/browser/renderer_host/software_layer_mac.mm

-// 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 "content/browser/renderer_host/software_layer_mac.h"
-
-#include "base/debug/trace_event.h"
-#include "base/mac/mac_util.h"
-#include "base/mac/scoped_cftyperef.h"
-#include "base/mac/sdk_forward_declarations.h"
-#include "ui/base/cocoa/animation_utils.h"
-
-@implementation SoftwareLayer
-
-- (id)init {
-  if (self = [super init]) {
-    [self setBackgroundColor:CGColorGetConstantColor(kCGColorWhite)];
-    [self setAnchorPoint:CGPointMake(0, 0)];
-    // Setting contents gravity is necessary to prevent the layer from being
-    // scaled during dyanmic resizes (especially with devtools open).
-    [self setContentsGravity:kCAGravityTopLeft];
-  }
-  return self;
-}
-
-- (void)setContentsToData:(const void *)data
-             withRowBytes:(size_t)rowBytes
-            withPixelSize:(gfx::Size)pixelSize
-          withScaleFactor:(float)scaleFactor {
-  TRACE_EVENT0("browser", "-[SoftwareLayer setContentsToData]");
-
-  // Disable animating the contents change or the scale factor change.
-  ScopedCAActionDisabler disabler;
-
-  // Set the contents of the software CALayer to be a CGImage with the provided
-  // pixel data. Make a copy of the data before backing the image with them,
-  // because the same buffer will be reused for the next frame.
-  base::ScopedCFTypeRef<CFDataRef> dataCopy(
-      CFDataCreate(NULL,
-                   static_cast<const UInt8 *>(data),
-                   rowBytes * pixelSize.height()));
-  base::ScopedCFTypeRef<CGDataProviderRef> dataProvider(
-      CGDataProviderCreateWithCFData(dataCopy));
-  base::ScopedCFTypeRef<CGImageRef> image(
-      CGImageCreate(pixelSize.width(),
-                    pixelSize.height(),
-                    8,
-                    32,
-                    rowBytes,
-                    base::mac::GetSystemColorSpace(),
-                    kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host,
-                    dataProvider,
-                    NULL,
-                    false,
-                    kCGRenderingIntentDefault));
-  [self setContents:(id)image.get()];
-  [self setBounds:CGRectMake(
-      0, 0, pixelSize.width() / scaleFactor, pixelSize.height() / scaleFactor)];
-
-  // Set the contents scale of the software CALayer.
-  if ([self respondsToSelector:(@selector(contentsScale))] &&
-      [self respondsToSelector:(@selector(setContentsScale:))] &&
-      [self contentsScale] != scaleFactor) {
-    [self setContentsScale:scaleFactor];
-  }
-}
-
-@end