Fix compilation with OS X SDK 10.8.

content/common/gpu/media/vt_stubs_header.fragment

 // 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.
 
-// Declare CoreMedia types. For SDKs >= 10.7, use CoreMedia headers.
-#if !defined(MAC_OS_X_VERSION_10_7) || \
-    MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7
-
 #include <CoreFoundation/CoreFoundation.h>
 
 extern "C" {
 
+//
+// Declare CoreMedia types.
+//
+
 typedef signed long CMItemCount;
 typedef uint32_t CMBlockBufferFlags;
 typedef struct OpaqueCMBlockBuffer *CMBlockBufferRef;
 typedef const struct opaqueCMFormatDescription *CMFormatDescriptionRef;
 typedef CMFormatDescriptionRef CMVideoFormatDescriptionRef;
 typedef struct opaqueCMSampleBuffer *CMSampleBufferRef;
 
 typedef int64_t CMTimeValue;
 typedef int32_t CMTimeScale;
 typedef int64_t CMTimeEpoch;
@@ skipping 21 matching lines @@
   uint32_t version;
   void *(*AllocateBlock)(void *refCon, size_t sizeInBytes);
   void (*FreeBlock)(void *refCon, void *doomedMemoryBlock, size_t sizeInBytes);
   void *refCon;
 } CMBlockBufferCustomBlockSource;
 
 typedef OSStatus (*CMSampleBufferMakeDataReadyCallback)(
     CMSampleBufferRef sbuf,
     void *makeDataReadyRefcon);
 
-}  // extern "C"
-
-#else
-#include <CoreMedia/CoreMedia.h>
-#endif
-
-// Declare VideoToolbox types. For SDKs >= 10.8, use VideoToolbox headers.
-#if !defined(MAC_OS_X_VERSION_10_8) || \
-    MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_8
-
-extern "C" {
+//
+// Declare VideoToolbox types.
+//
 
 typedef struct __CVBuffer *CVBufferRef;
 typedef CVBufferRef CVImageBufferRef;
 typedef uint32_t VTDecodeFrameFlags;
 typedef UInt32 VTDecodeInfoFlags;
 typedef struct OpaqueVTDecompressionSession* VTDecompressionSessionRef;
 
 typedef void (*VTDecompressionOutputCallback)(
     void *decompressionOutputRefCon,
     void *sourceFrameRefCon,
     OSStatus status,
     VTDecodeInfoFlags infoFlags,
     CVImageBufferRef imageBuffer,
     CMTime presentationTimeStamp,
     CMTime presentationDuration);
 
 typedef struct {
   VTDecompressionOutputCallback decompressionOutputCallback;
   void *decompressionOutputRefCon;
 } VTDecompressionOutputCallbackRecord;
 
 }  // extern "C"
-
-#else
-#include <VideoToolbox/VideoToolbox.h>
-#endif