DCHECK if shader compilation fails that it's due to context loss.

cc/test/test_context_support.h

 // Copyright 2013 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 CC_TEST_TEST_CONTEXT_SUPPORT_H_
 #define CC_TEST_TEST_CONTEXT_SUPPORT_H_
 
 #include <vector>
 
 #include "base/memory/weak_ptr.h"
@@ skipping 13 matching lines @@
   void SetSurfaceVisible(bool visible) override;
   void Swap() override;
   void PartialSwapBuffers(const gfx::Rect& sub_buffer) override;
   uint32 InsertFutureSyncPointCHROMIUM() override;
   void RetireSyncPointCHROMIUM(uint32 sync_point) override;
   void ScheduleOverlayPlane(int plane_z_order,
                             gfx::OverlayTransform plane_transform,
                             unsigned overlay_texture_id,
                             const gfx::Rect& display_bounds,
                             const gfx::RectF& uv_rect) override;
+  bool IsContextLost() override;
 
   void CallAllSyncPointCallbacks();
 
   typedef base::Callback<void(bool visible)> SurfaceVisibleCallback;
   void SetSurfaceVisibleCallback(
       const SurfaceVisibleCallback& set_visible_callback);
 
   typedef base::Callback<void(int plane_z_order,
                               gfx::OverlayTransform plane_transform,
                               unsigned overlay_texture_id,
                               const gfx::Rect& display_bounds,
                               const gfx::RectF& crop_rect)>
       ScheduleOverlayPlaneCallback;
   void SetScheduleOverlayPlaneCallback(
       const ScheduleOverlayPlaneCallback& schedule_overlay_plane_callback);
 
  private:
   std::vector<base::Closure> sync_point_callbacks_;
   SurfaceVisibleCallback set_visible_callback_;
   ScheduleOverlayPlaneCallback schedule_overlay_plane_callback_;
 
   base::WeakPtrFactory<TestContextSupport> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TestContextSupport);
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_TEST_CONTEXT_SUPPORT_H_