cc: Update discardable image metadata generation to get PaintImages.

cc/paint/paint_op_buffer.cc

 // Copyright 2017 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/paint/paint_op_buffer.h"
 
+#include "cc/paint/discardable_image_store.h"
 #include "cc/paint/display_item_list.h"
 #include "cc/paint/paint_record.h"
 #include "third_party/skia/include/core/SkAnnotation.h"
 
 namespace cc {
 
 #define TYPES(M)           \
   M(AnnotateOp)            \
   M(ClipPathOp)            \
   M(ClipRectOp)            \
@@ skipping 558 matching lines @@
 }
 
 void PaintOpBuffer::ShrinkToFit() {
   if (!used_ || used_ == reserved_)
     return;
   data_.realloc(used_);
   reserved_ = used_;
 }
 
 }  // namespace cc