cc: Move pre-decodes to background worker.

cc/paint/draw_image.h

 // Copyright 2015 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.
 
 #ifndef CC_PAINT_DRAW_IMAGE_H_
 #define CC_PAINT_DRAW_IMAGE_H_
 
 #include "cc/paint/paint_export.h"
 #include "cc/paint/paint_image.h"
 #include "third_party/skia/include/core/SkFilterQuality.h"
@@ skipping 12 matching lines @@
  public:
   DrawImage();
   DrawImage(PaintImage image,
             const SkIRect& src_rect,
             SkFilterQuality filter_quality,
             const SkMatrix& matrix,
             const gfx::ColorSpace& target_color_space);
   DrawImage(const DrawImage& other);
   ~DrawImage();
 
+  bool operator==(const DrawImage& other) const;
+
   const PaintImage& paint_image() const { return paint_image_; }
   const sk_sp<SkImage>& image() const { return paint_image_.sk_image(); }
   const SkSize& scale() const { return scale_; }
   const SkIRect& src_rect() const { return src_rect_; }
   SkFilterQuality filter_quality() const { return filter_quality_; }
   bool matrix_is_decomposable() const { return matrix_is_decomposable_; }
   const SkMatrix& matrix() const { return matrix_; }
   const gfx::ColorSpace& target_color_space() const {
     return target_color_space_;
   }
@@ skipping 15 matching lines @@
   SkFilterQuality filter_quality_;
   SkMatrix matrix_;
   SkSize scale_;
   bool matrix_is_decomposable_;
   gfx::ColorSpace target_color_space_;
 };
 
 }  // namespace cc
 
 #endif  // CC_PAINT_DRAW_IMAGE_H_