Chromium roll (https://codereview.chromium.org/976353002)

gpu/GLES2/gl2extchromium.h

Index: gpu/GLES2/gl2extchromium.h
diff --git a/gpu/GLES2/gl2extchromium.h b/gpu/GLES2/gl2extchromium.h
index 6a31b8f38ab7d4797fbb2dcaaf73bc7fba871c33..ec85bf2d4b0a755febc5df7f9e3fcf91e63f0fa8 100644
--- a/gpu/GLES2/gl2extchromium.h
+++ b/gpu/GLES2/gl2extchromium.h
@@ -394,13 +394,29 @@ typedef void (GL_APIENTRYP PFNGLBLITFRAMEBUFFERCHROMIUMPROC) (GLint srcX0, GLint
 #define GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM 0x9241
 #endif
 #ifdef GL_GLEXT_PROTOTYPES
-GL_APICALL void GL_APIENTRY glCopyTextureCHROMIUM(
-    GLenum target, GLenum source_id, GLenum dest_id, GLint level,
-    GLint internalformat, GLenum dest_type);
-#endif
-typedef void (GL_APIENTRYP PFNGLCOPYTEXTURECHROMIUMPROC) (
-    GLenum target, GLenum source_id, GLenum dest_id, GLint level,
-    GLint internalformat, GLenum dest_type);
+GL_APICALL void GL_APIENTRY glCopyTextureCHROMIUM(GLenum target,
+                                                  GLenum source_id,
+                                                  GLenum dest_id,
+                                                  GLint internalformat,
+                                                  GLenum dest_type);
+
+GL_APICALL void GL_APIENTRY glCopySubTextureCHROMIUM(GLenum target,
+                                                     GLenum source_id,
+                                                     GLenum dest_id,
+                                                     GLint xoffset,
+                                                     GLint yoffset);
+#endif
+typedef void(GL_APIENTRYP PFNGLCOPYTEXTURECHROMIUMPROC)(GLenum target,
+                                                        GLenum source_id,
+                                                        GLenum dest_id,
+                                                        GLint internalformat,
+                                                        GLenum dest_type);
+
+typedef void(GL_APIENTRYP PFNGLCOPYSUBTEXTURECHROMIUMPROC)(GLenum target,
+                                                           GLenum source_id,
+                                                           GLenum dest_id,
+                                                           GLint xoffset,
+                                                           GLint yoffset);
 #endif  /* GL_CHROMIUM_copy_texture */
 
 /* GL_CHROMIUM_lose_context */