Revert hotfix for EVDA tearing.

content/common/gpu/media/exynos_video_decode_accelerator.h

Index: content/common/gpu/media/exynos_video_decode_accelerator.h
diff --git a/content/common/gpu/media/exynos_video_decode_accelerator.h b/content/common/gpu/media/exynos_video_decode_accelerator.h
index 0eb3299c018e4465313ed35c00a55994dc80e053..af906f3aa82b1576f1dc6e6f95e0dcc4900716d0 100644
--- a/content/common/gpu/media/exynos_video_decode_accelerator.h
+++ b/content/common/gpu/media/exynos_video_decode_accelerator.h
@@ -91,12 +91,6 @@ class CONTENT_EXPORT ExynosVideoDecodeAccelerator :
     // Number of output buffers to use for each VDA stage above what's required
     // by the decoder (e.g. DPB size, in H264).
     kDpbOutputBufferExtraCount = 3,
-    // We're continuing to have issues with synchronization between Mali 3D and
-    // Exynos video decode, so we buffer this many extra GSC output buffers in
-    // the GSC free output buffers queue, to add a safety margin.
-    // Must be lesser than or equal to kDpbOutputBufferExtraCount.
-    // TODO(sheu): remove this hack (http://crbug.com/225563).
-    kGscOutputBufferExtraForSyncCount = 2,
   };
 
   // Internal state of the decoder.