Let AreVisibleResourcesReady return correct value for PictureImageLayerImpl

cc/layers/picture_image_layer_impl.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/layers/picture_image_layer_impl.h"
 
 #include "cc/debug/debug_colors.h"
 #include "cc/trees/layer_tree_impl.h"
 
 namespace cc {
@@ skipping 13 matching lines @@
     LayerTreeImpl* tree_impl) {
   return PictureImageLayerImpl::Create(tree_impl, id()).PassAs<LayerImpl>();
 }
 
 void PictureImageLayerImpl::GetDebugBorderProperties(
     SkColor* color, float* width) const {
   *color = DebugColors::ImageLayerBorderColor();
   *width = DebugColors::ImageLayerBorderWidth(layer_tree_impl());
 }
 
+bool PictureImageLayerImpl::ShouldAdjustRasterScale(
+    bool animating_transform_to_screen) const {
+  return false;
+}
+
 void PictureImageLayerImpl::CalculateRasterContentsScale(
     bool animating_transform_to_screen,
     float* raster_contents_scale,
-    float* low_res_raster_contents_scale) {
+    float* low_res_raster_contents_scale) const {
   // Don't scale images during rastering to ensure image quality, save memory
   // and avoid frequent re-rastering on change of scale.
   *raster_contents_scale = std::max(1.f, MinimumContentsScale());
   // We don't need low res tiles.
   *low_res_raster_contents_scale = *raster_contents_scale;
 }
 
 }  // namespace cc