Revert of 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 200c10f28310d88f49782deb10be79e031fdafac..b52411243e5ca7997446757212da88b7b5fe615a 100644
--- a/gpu/GLES2/gl2extchromium.h
+++ b/gpu/GLES2/gl2extchromium.h
@@ -686,35 +686,6 @@
 #ifndef GL_OVERLAY_TRANSFORM_ROTATE_270_CHROMIUM
 #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