gpu: Add GpuFence framework.

gpu/GLES2/gl2extchromium.h

 // Copyright (c) 2012 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.
 
 // This file contains Chromium-specific GLES2 extensions declarations.
 
 #ifndef GPU_GLES2_GL2EXTCHROMIUM_H_
 #define GPU_GLES2_GL2EXTCHROMIUM_H_
 
 #include <GLES2/gl2.h>
@@ skipping 110 matching lines @@
     GLenum internalformat,
     GLenum usage);
 #endif
 typedef GLuint(GL_APIENTRYP PFNGLCREATEGPUMEMORYBUFFERIMAGECHROMIUMPROC)(
     GLsizei width,
     GLsizei height,
     GLenum internalformat,
     GLenum usage);
 #endif  /* GL_CHROMIUM_gpu_memory_buffer_image */
 
+/* GL_CHROMIUM_fence */
+#ifndef GL_CHROMIUM_fence
+#define GL_CHROMIUM_fence 1
+
+typedef struct _ClientFence* ClientFence;
+
+#ifdef GL_GLEXT_PROTOTYPES
+GL_APICALL GLuint GL_APIENTRY glCreateFenceCHROMIUM(ClientFence fence);
+GL_APICALL void GL_APIENTRY glDestroyFenceCHROMIUM(GLuint fence_id);
+#endif
+typedef GLuint(GL_APIENTRYP PFNGLCREATEFENCECHROMIUMPROC)(ClientFence fence);
+typedef void(GL_APIENTRYP PFNGLDESTROYFENCECHROMIUMPROC)(GLuint fence_id);
+#endif /* GL_CHROMIUM_fence */
+
 /* GL_CHROMIUM_deschedule */
 #ifndef GL_CHROMIUM_deschedule
 #define GL_CHROMIUM_deschedule 1
 #ifdef GL_GLEXT_PROTOTYPES
 GL_APICALL void GL_APIENTRY glDescheduleUntilFinishedCHROMIUM();
 #endif
 typedef void(GL_APIENTRYP PFNGLDESCHEDULEUNTILFINISHEDCHROMIUM)();
 #endif  /* GL_CHROMIUM_deschedule */
 
 /* GL_CHROMIUM_map_sub */
@@ skipping 1060 matching lines @@
 GL_APICALL void GL_APIENTRY glCoverageModulationCHROMIUM(GLenum components);
 #endif
 #define GL_COVERAGE_MODULATION_CHROMIUM 0x9332
 #endif /* GL_CHROMIUM_framebuffer_mixed_samples */
 
 #ifdef __cplusplus
 }
 #endif
 
 #endif  // GPU_GLES2_GL2EXTCHROMIUM_H_