Implemented new fence syncs which replaces the old sync points.

gpu/command_buffer/cmd_buffer_functions.txt

Index: gpu/command_buffer/cmd_buffer_functions.txt
diff --git a/gpu/command_buffer/cmd_buffer_functions.txt b/gpu/command_buffer/cmd_buffer_functions.txt
index 9eda893e9e46f22efe46d485cac03b9e6201996c..9e97d6e62aad1462442e08664019e2f541e3efd8 100644
--- a/gpu/command_buffer/cmd_buffer_functions.txt
+++ b/gpu/command_buffer/cmd_buffer_functions.txt
@@ -307,6 +307,9 @@ GL_APICALL void         GL_APIENTRY glDiscardFramebufferEXT (GLenum target, GLsi
 GL_APICALL void         GL_APIENTRY glLoseContextCHROMIUM (GLenumResetStatus current, GLenumResetStatus other);
 GL_APICALL GLuint       GL_APIENTRY glInsertSyncPointCHROMIUM (void);
 GL_APICALL void         GL_APIENTRY glWaitSyncPointCHROMIUM (GLuint sync_point);
+GL_APICALL GLuint64     GL_APIENTRY glInsertFenceSyncCHROMIUM (void);
+GL_APICALL void         GL_APIENTRY glGenSyncTokenCHROMIUM (GLuint64 fence_sync, GLbyte* sync_token);
+GL_APICALL void         GL_APIENTRY glWaitSyncTokenCHROMIUM (const GLbyte* sync_token);
 GL_APICALL void         GL_APIENTRY glDrawBuffersEXT (GLsizei count, const GLenum* bufs);
 GL_APICALL void         GL_APIENTRY glDiscardBackbufferCHROMIUM (void);
 GL_APICALL void         GL_APIENTRY glScheduleOverlayPlaneCHROMIUM (GLint plane_z_order, GLenum plane_transform, GLuint overlay_texture_id, GLint bounds_x, GLint bounds_y, GLint bounds_width, GLint bounds_height, GLfloat uv_x, GLfloat uv_y, GLfloat uv_width, GLfloat uv_height);