Add subscribeUniform extension pipeline

gpu/GLES2/gl2extchromium.h

Index: gpu/GLES2/gl2extchromium.h
diff --git a/gpu/GLES2/gl2extchromium.h b/gpu/GLES2/gl2extchromium.h
index b52411243e5ca7997446757212da88b7b5fe615a..200c10f28310d88f49782deb10be79e031fdafac 100644
--- a/gpu/GLES2/gl2extchromium.h
+++ b/gpu/GLES2/gl2extchromium.h
@@ -687,6 +687,35 @@ typedef void (GL_APIENTRYP PFNGLWAITSYNCPOINTCHROMIUMPROC) (GLuint sync_point);
 #define GL_OVERLAY_TRANSFORM_ROTATE_270_CHROMIUM 0x924A
 #endif
 
+/* GL_CHROMIUM_subscribe_uniform */
+#ifndef GL_CHROMIUM_subscribe_uniform
+#define GL_CHROMIUM_subscribe_uniform 1
+
+#ifndef GL_SUBSCRIBED_VALUES_BUFFER_CHROMIUM
+#define GL_SUBSCRIBED_VALUES_BUFFER_CHROMIUM 0x924B
+#endif
+
+#ifndef GL_MOUSE_POSITION_CHROMIUM
+#define GL_MOUSE_POSITION_CHROMIUM 0x924C
+#endif
+
+#ifdef GL_GLEXT_PROTOTYPES
+GL_APICALL void GL_APIENTRY
+glGenValuebuffersCHROMIUM(GLsizei n, GLuint* buffers);
+GL_APICALL void GL_APIENTRY
+glDeleteValuebuffersCHROMIUM(GLsizei n, const GLuint* valuebuffers);
+GL_APICALL GLboolean GL_APIENTRY glIsValuebufferCHROMIUM(GLuint valuebuffer);
+GL_APICALL void GL_APIENTRY
+glBindValuebufferCHROMIUM(GLenum target, GLuint valuebuffer);
+GL_APICALL void GL_APIENTRY
+glSubscribeValueCHROMIUM(GLenum target, GLenum subscription);
+GL_APICALL void GL_APIENTRY glPopulateSubscribedValuesCHROMIUM(GLenum target);
+GL_APICALL void GL_APIENTRY glUniformValuebufferCHROMIUM(GLint location,
+                                                         GLenum target,
+                                                         GLenum subscription);
+#endif
+#endif /* GL_CHROMIUM_subscribe_uniform */
+
 #ifdef GL_GLEXT_PROTOTYPES
 GL_APICALL void GL_APIENTRY
     glScheduleOverlayPlaneCHROMIUM(GLint plane_z_order,