Bit-pack bools in scroll and effect nodes.

cc/trees/scroll_node.cc

 // Copyright 2016 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 "base/trace_event/trace_event_argument.h"
 #include "cc/base/math_util.h"
 #include "cc/input/main_thread_scrolling_reason.h"
 #include "cc/layers/layer.h"
 #include "cc/trees/element_id.h"
 #include "cc/trees/property_tree.h"
 #include "cc/trees/scroll_node.h"
 
 namespace cc {
 
 ScrollNode::ScrollNode()
     : id(ScrollTree::kInvalidNodeId),
       parent_id(ScrollTree::kInvalidNodeId),
       owning_layer_id(Layer::INVALID_ID),
-      scrollable(false),
       main_thread_scrolling_reasons(
           MainThreadScrollingReason::kNotScrollingOnMain),
+      scrollable(false),
       max_scroll_offset_affected_by_page_scale(false),
       scrolls_inner_viewport(false),
       scrolls_outer_viewport(false),
       should_flatten(false),
       user_scrollable_horizontal(false),
       user_scrollable_vertical(false),
       transform_id(0) {}
 
 ScrollNode::ScrollNode(const ScrollNode& other) = default;
 
@@ skipping 28 matching lines @@
                              offset_to_transform_parent, value);
   value->SetBoolean("should_flatten", should_flatten);
   value->SetBoolean("user_scrollable_horizontal", user_scrollable_horizontal);
   value->SetBoolean("user_scrollable_vertical", user_scrollable_vertical);
 
   element_id.AddToTracedValue(value);
   value->SetInteger("transform_id", transform_id);
 }
 
 }  // namespace cc