Cleanup display creation in mus tests.

services/ui/ws/platform_display.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 SERVICES_UI_WS_PLATFORM_DISPLAY_H_
 #define SERVICES_UI_WS_PLATFORM_DISPLAY_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 48 matching lines @@
 
   virtual gfx::Rect GetBounds() const = 0;
 
   // Updates the viewport metrics for the display, returning true if any
   // metrics have changed.
   virtual bool UpdateViewportMetrics(
       const display::ViewportMetrics& metrics) = 0;
 
   virtual const display::ViewportMetrics& GetViewportMetrics() const = 0;
 
-  virtual bool IsPrimaryDisplay() const = 0;
-
   // Notifies the PlatformDisplay that a connection to the gpu has been
   // established.
   virtual void OnGpuChannelEstablished(
       scoped_refptr<gpu::GpuChannelHost> gpu_channel) = 0;
 
   // Overrides factory for testing. Default (NULL) value indicates regular
   // (non-test) environment.
   static void set_factory_for_testing(PlatformDisplayFactory* factory) {
     PlatformDisplay::factory_ = factory;
   }
 
  private:
   // Static factory instance (always NULL for non-test).
   static PlatformDisplayFactory* factory_;
 };
 
 
 }  // namespace ws
 }  // namespace ui
 
 #endif  // SERVICES_UI_WS_PLATFORM_DISPLAY_H_