cc: Added raster source.

cc/resources/picture_pile_base.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/resources/picture_pile_base.h"
 
 #include <algorithm>
 #include <set>
 #include <vector>
 
@@ skipping 124 matching lines @@
 }
 
 bool PicturePileBase::HasRecordingAt(int x, int y) {
   PictureMap::const_iterator found = picture_map_.find(PictureMapKey(x, y));
   if (found == picture_map_.end())
     return false;
   return !!found->second.GetPicture();
 }
 
 bool PicturePileBase::CanRaster(float contents_scale,
-                                const gfx::Rect& content_rect) {
+                                const gfx::Rect& content_rect) const {
   if (tiling_.tiling_size().IsEmpty())
     return false;
   gfx::Rect layer_rect = gfx::ScaleToEnclosingRect(
       content_rect, 1.f / contents_scale);
   layer_rect.Intersect(gfx::Rect(tiling_.tiling_size()));
 
   // Common case inside of viewport to avoid the slower map lookups.
   if (recorded_viewport_.Contains(layer_rect)) {
     // Sanity check that there are no false positives in recorded_viewport_.
     DCHECK(CanRasterSlowTileCheck(layer_rect));
@@ skipping 92 matching lines @@
 const Picture* PicturePileBase::PictureInfo::GetPicture() const {
   return picture_.get();
 }
 
 float PicturePileBase::PictureInfo::GetInvalidationFrequency() const {
   return invalidation_history_.count() /
          static_cast<float>(INVALIDATION_FRAMES_TRACKED);
 }
 
 }  // namespace cc