cc: Rename ImageDecodeController to ImageDecodeCache.

cc/layers/picture_layer_impl.cc

Index: cc/layers/picture_layer_impl.cc
diff --git a/cc/layers/picture_layer_impl.cc b/cc/layers/picture_layer_impl.cc
index 91c49e1e92e830e8118cd32dfa665d8216a1fff2..8497191d71c21e181e34dfb4ca863c6464ab3457 100644
--- a/cc/layers/picture_layer_impl.cc
+++ b/cc/layers/picture_layer_impl.cc
@@ -577,8 +577,8 @@ void PictureLayerImpl::UpdateRasterSource(
 
   // Only set the image decode controller when we're committing.
   if (!pending_set) {
-    raster_source_->set_image_decode_controller(
-        layer_tree_impl()->image_decode_controller());
+    raster_source_->set_image_decode_cache(
+        layer_tree_impl()->image_decode_cache());
   }
 
   // The |new_invalidation| must be cleared before updating tilings since they
@@ -679,8 +679,8 @@ void PictureLayerImpl::ReleaseTileResources() {
 void PictureLayerImpl::RecreateTileResources() {
   tilings_ = CreatePictureLayerTilingSet();
   if (raster_source_) {
-    raster_source_->set_image_decode_controller(
-        layer_tree_impl()->image_decode_controller());
+    raster_source_->set_image_decode_cache(
+        layer_tree_impl()->image_decode_cache());
   }
 }