cc: Don't clip tile priority visible rect to content bounds.

cc/resources/picture_layer_tiling.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 "cc/resources/picture_layer_tiling.h"
 
 #include <algorithm>
 #include <cmath>
 #include <limits>
 #include <set>
@@ skipping 518 matching lines @@
   // Clip the skewport to |max_skewport|.
   skewport.Intersect(max_skewport);
 
   // Finally, ensure that visible rect is contained in the skewport.
   skewport.Union(visible_rect_in_content_space);
   return skewport;
 }
 
 void PictureLayerTiling::UpdateTilePriorities(
     WhichTree tree,
-    const gfx::Rect& visible_layer_rect,
+    const gfx::Rect& viewport_in_layer_space,
     float ideal_contents_scale,
     double current_frame_time_in_seconds,
     const Occlusion& occlusion_in_layer_space) {
   if (!NeedsUpdateForFrameAtTime(current_frame_time_in_seconds)) {
     // This should never be zero for the purposes of has_ever_been_updated().
     DCHECK_NE(current_frame_time_in_seconds, 0.0);
     return;
   }
 
   gfx::Rect visible_rect_in_content_space =
-      gfx::ScaleToEnclosingRect(visible_layer_rect, contents_scale_);
+      gfx::ScaleToEnclosingRect(viewport_in_layer_space, contents_scale_);
 
   if (tiling_size().IsEmpty()) {
     last_impl_frame_time_in_seconds_ = current_frame_time_in_seconds;
     last_visible_rect_in_content_space_ = visible_rect_in_content_space;
     return;
   }
 
   size_t max_tiles_for_interest_area = client_->GetMaxTilesForInterestArea();
 
   gfx::Size tile_size = tiling_data_.max_texture_size();
@@ skipping 630 matching lines @@
   DCHECK(*this);
   do {
     ++current_eviction_tiles_index_;
   } while (current_eviction_tiles_index_ != eviction_tiles_->size() &&
            !(*eviction_tiles_)[current_eviction_tiles_index_]->HasResources());
 
   return *this;
 }
 
 }  // namespace cc