cc: Rename ImageDecodeController to ImageDecodeCache.

cc/playback/image_hijack_canvas.h

 // Copyright 2016 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_PLAYBACK_IMAGE_HIJACK_CANVAS_H_
 #define CC_PLAYBACK_IMAGE_HIJACK_CANVAS_H_
 
 #include "base/macros.h"
 #include "third_party/skia/include/utils/SkNWayCanvas.h"
 
 namespace cc {
 
-class ImageDecodeController;
+class ImageDecodeCache;
 
 class ImageHijackCanvas : public SkNWayCanvas {
  public:
   ImageHijackCanvas(int width,
                     int height,
-                    ImageDecodeController* image_decode_controller);
+                    ImageDecodeCache* image_decode_cache);
 
  private:
   // Ensure that pictures are unpacked by this canvas, instead of being
   // forwarded to the raster canvas.
   void onDrawPicture(const SkPicture* picture,
                      const SkMatrix* matrix,
                      const SkPaint* paint) override;
 
   void onDrawImage(const SkImage* image,
                    SkScalar x,
                    SkScalar y,
                    const SkPaint* paint) override;
   void onDrawImageRect(const SkImage* image,
                        const SkRect* src,
                        const SkRect& dst,
                        const SkPaint* paint,
                        SrcRectConstraint constraint) override;
   void onDrawImageNine(const SkImage* image,
                        const SkIRect& center,
                        const SkRect& dst,
                        const SkPaint* paint) override;
 
-  ImageDecodeController* image_decode_controller_;
+  ImageDecodeCache* image_decode_cache_;
 
   DISALLOW_COPY_AND_ASSIGN(ImageHijackCanvas);
 };
 
 }  // namespace cc
 
 #endif  // CC_PLAYBACK_IMAGE_HIJACK_CANVAS_H_