cc: Remove texture scaling and clear edge texels of a layer.

cc/picture_pile_base.cc

 // Copyright 2013 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/picture_pile_base.h"
 
 #include "base/logging.h"
+#include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/rect_conversions.h"
 
 namespace {
 // Dimensions of the tiles in this picture pile as well as the dimensions of
 // the base picture in each tile.
 const int kBasePictureSize = 3000;
 const int kTileGridBorderPixels = 1;
 }
 
 namespace cc {
 
 PicturePileBase::PicturePileBase()
-    : min_contents_scale_(0) {
+    : min_contents_scale_(0)
+    , background_color_(SkColorSetARGBInline(0, 0, 0, 0)) {
   tiling_.SetMaxTextureSize(gfx::Size(kBasePictureSize, kBasePictureSize));
   tile_grid_info_.fTileInterval.setEmpty();
   tile_grid_info_.fMargin.setEmpty();
   tile_grid_info_.fOffset.setZero();
 }
 
 PicturePileBase::~PicturePileBase() {
 }
 
 void PicturePileBase::Resize(gfx::Size new_size) {
@@ skipping 67 matching lines @@
 void PicturePileBase::Clear() {
   picture_list_map_.clear();
 }
 
 void PicturePileBase::PushPropertiesTo(PicturePileBase* other) {
   other->picture_list_map_ = picture_list_map_;
   other->tiling_ = tiling_;
   other->recorded_region_ = recorded_region_;
   other->min_contents_scale_ = min_contents_scale_;
   other->tile_grid_info_ = tile_grid_info_;
+  other->background_color_ = background_color_;
 }
 
 void PicturePileBase::UpdateRecordedRegion() {
   recorded_region_.Clear();
   for (int x = 0; x < num_tiles_x(); ++x) {
     for (int y = 0; y < num_tiles_y(); ++y) {
       if (!HasRecordingAt(x, y))
         continue;
       recorded_region_.Union(tile_bounds(x, y));
     }
@@ skipping 12 matching lines @@
 bool PicturePileBase::CanRaster(float contents_scale, gfx::Rect content_rect) {
   if (tiling_.total_size().IsEmpty())
     return false;
   gfx::Rect layer_rect = gfx::ToEnclosingRect(
       gfx::ScaleRect(content_rect, 1.f / contents_scale));
   layer_rect.Intersect(gfx::Rect(tiling_.total_size()));
   return recorded_region_.Contains(layer_rect);
 }
 
 }  // namespace cc