Fix ODR violations caused by mojoms being included in multiple components.

third_party/WebKit/Source/core/offscreencanvas/BUILD.gn

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//third_party/WebKit/Source/core/core.gni")
 
 blink_core_sources("offscreencanvas") {
   sources = [
     "OffscreenCanvas.cpp",
     "OffscreenCanvas.h",
   ]
   deps = [
     "//mojo/public/cpp/bindings:bindings",
-    "//third_party/WebKit/public:offscreen_canvas_mojo_bindings_blink",

[sashab, 2016/12/19 23:23:43]

What does this mean? Is this correct?

Not sure if we want things relying on Source/platform or exposed modules

Adding haraken@ for advice

+    "//third_party/WebKit/Source/platform",

[haraken, 2016/12/20 00:13:06]

core/ to platform/ should be already allowed. You won't need this.

[Sam McNally, 2016/12/20 00:28:21]

Done.

   ]
 }