Make base::Value::TYPE a scoped enum.

cc/layers/layer_impl.cc

 // Copyright 2012 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/layer_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 950 matching lines @@
   gfx::BoxF box;
   if (LayerUtils::GetAnimationBounds(*this, &box))
     MathUtil::AddToTracedValue("animation_bounds", box, state);
 
   if (debug_info_) {
     std::string str;
     debug_info_->AppendAsTraceFormat(&str);
     base::JSONReader json_reader;
     std::unique_ptr<base::Value> debug_info_value(json_reader.ReadToValue(str));
 
-    if (debug_info_value->IsType(base::Value::TYPE_DICTIONARY)) {
+    if (debug_info_value->IsType(base::Value::Type::DICTIONARY)) {
       base::DictionaryValue* dictionary_value = nullptr;
       bool converted_to_dictionary =
           debug_info_value->GetAsDictionary(&dictionary_value);
       DCHECK(converted_to_dictionary);
       for (base::DictionaryValue::Iterator it(*dictionary_value); !it.IsAtEnd();
            it.Advance()) {
         state->SetValue(it.key().data(), it.value().CreateDeepCopy());
       }
     } else {
       NOTREACHED();
@@ skipping 117 matching lines @@
            .layer_transforms_should_scale_layer_contents) {
     return default_scale;
   }
 
   gfx::Vector2dF transform_scales = MathUtil::ComputeTransform2dScaleComponents(
       ScreenSpaceTransform(), default_scale);
   return std::max(transform_scales.x(), transform_scales.y());
 }
 
 }  // namespace cc