DevTools: generate string16-based handlers for v8_inspector.

third_party/WebKit/Source/core/inspector/InspectorLayerTreeAgent.h

 /*
  * Copyright (C) 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 32 matching lines @@
 
 class GraphicsContext;
 class GraphicsLayer;
 class InspectedFrames;
 class LayoutObject;
 class LayoutRect;
 class PictureSnapshot;
 class PaintLayer;
 class PaintLayerCompositor;
 
-typedef String ErrorString;
-
 class CORE_EXPORT InspectorLayerTreeAgent final : public InspectorBaseAgent<InspectorLayerTreeAgent, protocol::Frontend::LayerTree>, public protocol::Dispatcher::LayerTreeCommandHandler {
     WTF_MAKE_NONCOPYABLE(InspectorLayerTreeAgent);
 public:
     static PassOwnPtrWillBeRawPtr<InspectorLayerTreeAgent> create(InspectedFrames* inspectedFrames)
     {
         return adoptPtrWillBeNoop(new InspectorLayerTreeAgent(inspectedFrames));
     }
     ~InspectorLayerTreeAgent() override;
     DECLARE_VIRTUAL_TRACE();
 
@@ skipping 41 matching lines @@
     Vector<int, 2> m_pageOverlayLayerIds;
 
     typedef HashMap<String, RefPtr<PictureSnapshot>> SnapshotById;
     SnapshotById m_snapshotById;
 };
 
 } // namespace blink
 
 
 #endif // !defined(InspectorLayerTreeAgent_h)