chromeos: Makes mushrome use simplified display management

ash/host/transformer_helper.h

 // Copyright 2014 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.
 
 #ifndef ASH_HOST_TRANSFORMER_HELPER_H_
 #define ASH_HOST_TRANSFORMER_HELPER_H_
 
 #include <memory>
 
+#include "ash/ash_export.h"
 #include "base/macros.h"
 
 namespace gfx {
 class Insets;
 class Size;
 class Transform;
 }
 
 namespace ash {
 class AshWindowTreeHost;
 class RootWindowTransformer;
 
 // A helper class to handle ash specific feature that requires
 // transforming a root window (such as rotation, UI zooming).
-class TransformerHelper {
+class ASH_EXPORT TransformerHelper {
  public:
   explicit TransformerHelper(AshWindowTreeHost* ash_host);
   ~TransformerHelper();
 
   // Initializes the transformer with identity transform.
   void Init();
 
   // Returns the the insets that specifies the effective root window
   // area within the host window.
   gfx::Insets GetHostInsets() const;
@@ skipping 16 matching lines @@
  private:
   AshWindowTreeHost* ash_host_;
   std::unique_ptr<RootWindowTransformer> transformer_;
 
   DISALLOW_COPY_AND_ASSIGN(TransformerHelper);
 };
 
 }  // namespace ash
 
 #endif  // ASH_HOST_TRANSFORMER_HELPER_H_