[Ozone-Gbm] Explicitly crash if trying software rendering on GBM

ui/ozone/platform/dri/gbm_surface_factory.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 UI_OZONE_PLATFORM_DRI_GBM_SURFACE_FACTORY_H_
 #define UI_OZONE_PLATFORM_DRI_GBM_SURFACE_FACTORY_H_
 
 #include "ui/ozone/platform/dri/dri_surface_factory.h"
 
 namespace ui {
@@ skipping 11 matching lines @@
   void InitializeGpu(DrmDeviceManager* drm_device_manager,
                      DriWindowDelegateManager* window_manager);
 
   // DriSurfaceFactory:
   intptr_t GetNativeDisplay() override;
   int GetDrmFd() override;
   const int32_t* GetEGLSurfaceProperties(const int32_t* desired_list) override;
   bool LoadEGLGLES2Bindings(
       AddGLLibraryCallback add_gl_library,
       SetGLGetProcAddressProcCallback set_gl_get_proc_address) override;
+  scoped_ptr<SurfaceOzoneCanvas> CreateCanvasForWidget(
+      gfx::AcceleratedWidget widget);

[spang, 2015/02/28 00:44:45]

override;

[dnicoara, 2015/03/02 16:18:23]

Done.

   scoped_ptr<ui::SurfaceOzoneEGL> CreateEGLSurfaceForWidget(
       gfx::AcceleratedWidget w) override;
   scoped_ptr<SurfaceOzoneEGL> CreateSurfacelessEGLSurfaceForWidget(
       gfx::AcceleratedWidget widget) override;
   scoped_refptr<ui::NativePixmap> CreateNativePixmap(
       gfx::AcceleratedWidget widget,
       gfx::Size size,
       BufferFormat format,
       BufferUsage usage) override;
   OverlayCandidatesOzone* GetOverlayCandidates(
@@ skipping 13 matching lines @@
   bool allow_surfaceless_;
 
   DrmDeviceManager* drm_device_manager_;  // Not owned.
 
   DISALLOW_COPY_AND_ASSIGN(GbmSurfaceFactory);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRI_GBM_SURFACE_FACTORY_H_