Implemented new fence syncs which replaces the old sync points.

gpu/GLES2/gl2extchromium.h

Index: gpu/GLES2/gl2extchromium.h
diff --git a/gpu/GLES2/gl2extchromium.h b/gpu/GLES2/gl2extchromium.h
index 74988dc684708ec993a7cb32d333a5d404201145..51928a3168a0854834d44faf238d82b088c9e219 100644
--- a/gpu/GLES2/gl2extchromium.h
+++ b/gpu/GLES2/gl2extchromium.h
@@ -695,12 +695,26 @@ typedef void (GL_APIENTRYP PFNGLGETPROGRAMINFOCHROMIUMPROC) (
 /* GL_CHROMIUM_sync_point */
 #ifndef GL_CHROMIUM_sync_point
 #define GL_CHROMIUM_sync_point 1
+
+#ifndef GL_SYNC_TOKEN_SIZE_CHROMIUM
+#define GL_SYNC_TOKEN_SIZE_CHROMIUM 24
+#endif
+
 #ifdef GL_GLEXT_PROTOTYPES
 GL_APICALL GLuint GL_APIENTRY glInsertSyncPointCHROMIUM();
 GL_APICALL void GL_APIENTRY glWaitSyncPointCHROMIUM(GLuint sync_point);
+GL_APICALL GLuint64 GL_APIENTRY glInsertFenceSyncCHROMIUM();
+GL_APICALL void GL_APIENTRY glGenSyncTokenCHROMIUM(GLuint64 fence_sync,
+                                                   GLbyte* sync_token);
+GL_APICALL void GL_APIENTRY glWaitSyncTokenCHROMIUM(const GLbyte* sync_token);
 #endif
 typedef GLuint (GL_APIENTRYP PFNGLINSERTSYNCPOINTCHROMIUMPROC) ();
 typedef void (GL_APIENTRYP PFNGLWAITSYNCPOINTCHROMIUMPROC) (GLuint sync_point);
+typedef GLuint64 (GL_APIENTRYP PFNGLINSERTFENCESYNCCHROMIUMPROC) ();
+typedef void (GL_APIENTRYP PFNGLGENSYNCTOKENCHROMIUMPROC) (GLuint64 fence_sync,
+                                                           GLbyte* sync_token);
+typedef void (GL_APIENTRYP PFNGLWAITSYNCTOKENCHROMIUM) (
+    const GLbyte* sync_tokens);
 #endif  /* GL_CHROMIUM_sync_point */
 
 #ifndef GL_CHROMIUM_color_buffer_float_rgba