Implement the logic to kick off image decoding jobs for TileManager

cc/picture_pile_impl.cc

 // Copyright 2012 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 "base/debug/trace_event.h"
 #include "cc/picture_pile_impl.h"
 #include "cc/rendering_stats.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkSize.h"
 
@@ skipping 37 matching lines @@
 
     SkISize deviceSize = canvas->getDeviceSize();
     stats->totalPixelsRasterized += deviceSize.width() * deviceSize.height();
   }
   canvas->restore();
 
   stats->totalRasterizeTimeInSeconds += (base::TimeTicks::Now() -
                                          rasterizeBeginTime).InSecondsF();
 }
 
+std::vector<SkPixelRef*> PicturePileImpl::GatherPixelRefs(

[nduca, 2012/12/06 08:46:53]

style nit, should we pass in the vector that we're gathering into? Returning
vectors by value dupes them.

[qinmin, 2012/12/07 05:06:28]

Done.

+    const gfx::Rect& rect) {
+  std::vector<SkPixelRef*> result;
+  for (PicturePile::Pile::const_iterator i = pile_.begin();
+      i != pile_.end(); ++i) {
+    std::vector<SkPixelRef*> pixel_refs = (*i)->GatherPixelRefs(rect);
+    result.insert(result.end(), pixel_refs.begin(), pixel_refs.end());
+  }
+  return result;
+}
+
 }  // namespace cc