cc: Consider visible rect for update tile priority early out.

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 520 matching lines @@
   skewport.Union(visible_rect_in_content_space);
   return skewport;
 }
 
 void PictureLayerTiling::ComputeTilePriorityRects(
     WhichTree tree,
     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(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;
   }
 
   // Calculate the skewport.
@@ skipping 665 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