cc: Add image to rect map in DiscardableImageMap.

cc/playback/raster_source.h

 // 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.
 
 #ifndef CC_PLAYBACK_RASTER_SOURCE_H_
 #define CC_PLAYBACK_RASTER_SOURCE_H_
 
 #include <stddef.h>
 
 #include <memory>
 #include <vector>
 
 #include "base/macros.h"
 #include "cc/base/cc_export.h"
 #include "cc/debug/rendering_stats_instrumentation.h"
+#include "cc/playback/image_id.h"
 #include "cc/playback/recording_source.h"
 #include "skia/ext/analysis_canvas.h"
 #include "third_party/skia/include/core/SkPicture.h"
 
 namespace gfx {
 class ColorSpace;
 }
 
 namespace cc {
 class DisplayItemList;
@@ skipping 74 matching lines @@
   // Return true iff this raster source can raster the given rect in layer
   // space.
   bool CoversRect(const gfx::Rect& layer_rect) const;
 
   // Returns true if this raster source has anything to rasterize.
   virtual bool HasRecordings() const;
 
   // Valid rectangle in which everything is recorded and can be rastered from.
   virtual gfx::Rect RecordedViewport() const;
 
+  gfx::Rect GetRectForImage(ImageId image_id) const;
+
   // Tracing functionality.
   virtual void DidBeginTracing();
   virtual void AsValueInto(base::trace_event::TracedValue* array) const;
   virtual sk_sp<SkPicture> GetFlattenedPicture();
   virtual size_t GetPictureMemoryUsage() const;
 
   // Return true if LCD anti-aliasing may be used when rastering text.
   virtual bool CanUseLCDText() const;
 
   scoped_refptr<RasterSource> CreateCloneWithoutLCDText() const;
@@ skipping 34 matching lines @@
   void RasterCommon(SkCanvas* canvas, SkPicture::AbortCallback* callback) const;
 
   void PrepareForPlaybackToCanvas(SkCanvas* canvas) const;
 
   DISALLOW_COPY_AND_ASSIGN(RasterSource);
 };
 
 }  // namespace cc
 
 #endif  // CC_PLAYBACK_RASTER_SOURCE_H_