cc: Force an update on tile size after viewport resize

cc/layers/picture_layer_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 "cc/layers/picture_layer_impl.h"
 
 #include <algorithm>
 #include <cmath>
 #include <limits>
 #include <set>
@@ skipping 550 matching lines @@
       raster_source_->CreateCloneWithoutLCDText();
   // Synthetically invalidate everything.
   gfx::Rect bounds_rect(bounds());
   Region invalidation(bounds_rect);
   UpdateRasterSource(new_raster_source, &invalidation, nullptr);
   SetUpdateRect(bounds_rect);
 
   DCHECK(!RasterSourceUsesLCDText());
 }
 
+void PictureLayerImpl::UpdateViewportAfterCommit() {
+  // When we are using GPU rasterization, the tiling texture size is dependant
+  // on the viewport size. Here we update the raster source, which in turn
+  // updates the tiling texture size.
+  DCHECK(layer_tree_impl()->IsPendingTree());

[enne (OOO), 2015/03/19 17:55:24]

IsSyncTree.  Please make sure you have a commit to active test for this.

[danakj, 2015/03/19 18:43:38]

(Any single thread LayerTreeTest would)

+  DCHECK(layer_tree_impl()->use_gpu_rasterization());
+  tilings_->UpdateTilingsToCurrentRasterSource(
+      raster_source_, nullptr, invalidation_, MinimumContentsScale(),
+      MaximumContentsScale());
+}
+
 bool PictureLayerImpl::RasterSourceUsesLCDText() const {
   return raster_source_ ? raster_source_->CanUseLCDText()
                         : layer_tree_impl()->settings().can_use_lcd_text;
 }
 
 void PictureLayerImpl::NotifyTileStateChanged(const Tile* tile) {
   if (layer_tree_impl()->IsActiveTree()) {
     gfx::RectF layer_damage_rect =
         gfx::ScaleRect(tile->content_rect(), 1.f / tile->contents_scale());
     AddDamageRect(layer_damage_rect);
@@ skipping 647 matching lines @@
 
 bool PictureLayerImpl::IsOnActiveOrPendingTree() const {
   return !layer_tree_impl()->IsRecycleTree();
 }
 
 bool PictureLayerImpl::HasValidTilePriorities() const {
   return IsOnActiveOrPendingTree() && IsDrawnRenderSurfaceLayerListMember();
 }
 
 }  // namespace cc