Move scroll event handlers from layer to layer tree view.

cc/test/layer_tree_json_parser.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/test/layer_tree_json_parser.h"
 
 #include <stddef.h>
 
 #include "base/test/values_test_util.h"
 #include "base/values.h"
@@ skipping 107 matching lines @@
   //
   // For now, we can safely indicate a layer is scrollable by giving it a
   // pointer to itself, something not normally allowed in a working tree.
   //
   // https://code.google.com/p/chromium/issues/detail?id=330622
   //
   if (dict->GetBoolean("Scrollable", &scrollable))
     new_layer->SetScrollClipLayerId(scrollable ? new_layer->id()
                                                : Layer::INVALID_ID);
 
-  bool scroll_handler;
-  if (dict->GetBoolean("ScrollHandler", &scroll_handler))
-    new_layer->SetHaveScrollEventHandlers(scroll_handler);
-
   bool is_3d_sorted;
   if (dict->GetBoolean("Is3DSorted", &is_3d_sorted)) {
     // A non-zero context ID will put the layer into a 3D sorting context
     new_layer->Set3dSortingContextId(is_3d_sorted ? 1 : 0);
   }
 
   if (dict->HasKey("TouchRegion")) {
     success &= dict->GetList("TouchRegion", &list);
     Region touch_region;
     for (size_t i = 0; i < list->GetSize(); ) {
@@ skipping 30 matching lines @@
 
 }  // namespace
 
 scoped_refptr<Layer> ParseTreeFromJson(std::string json,
                                        ContentLayerClient* content_client) {
   scoped_ptr<base::Value> val = base::test::ParseJson(json);
   return ParseTreeFromValue(val.get(), content_client);
 }
 
 }  // namespace cc