cc: Use the size of the source frame along with the source frame's renderpasses

cc/layer_tree_host_impl.cc

 // Copyright 2011 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/layer_tree_host_impl.h"
 
 #include <algorithm>
 
 #include "base/basictypes.h"
 #include "base/debug/trace_event.h"
@@ skipping 517 matching lines @@
     }
 
 #ifndef NDEBUG
     for (size_t i = 0; i < frame.renderPasses.size(); ++i) {
         for (size_t j = 0; j < frame.renderPasses[i]->quad_list.size(); ++j)
             DCHECK(frame.renderPasses[i]->quad_list[j]->shared_quad_state);
         DCHECK(frame.renderPassesById.find(frame.renderPasses[i]->id)
                != frame.renderPassesById.end());
     }
 #endif
+    DCHECK(frame.renderPasses.back()->output_rect.origin().IsOrigin());
 
     if (!activeTree()->has_transparent_background()) {
         frame.renderPasses.back()->has_transparent_background = false;
         appendQuadsToFillScreen(frame.renderPasses.back(), rootLayer(), activeTree()->background_color(), occlusionTracker);
     }
 
     if (drawFrame)
         occlusionTracker.overdrawMetrics().recordMetrics(this);
 
     removeRenderPasses(CullRenderPassesWithNoQuads(), frame);
@@ skipping 1124 matching lines @@
     LayerImpl* layer = getNonCompositedContentLayerRecursive(tree->RootLayer());
     return layer ? layer->getPicture() : skia::RefPtr<SkPicture>();
 }
 
 void LayerTreeHostImpl::savePaintTime(const base::TimeDelta& totalPaintTime)
 {
     m_paintTimeCounter->SavePaintTime(totalPaintTime);
 }
 
 }  // namespace cc