Version: Chromium master revision 68623971b (#403382)
OS: Ubuntu 14.04 64-bit

What steps will reproduce the problem?
(1) Attempt to compile a Chromium-based application using GYP configuration.

What is the expected output?
The compilation should succeed.

What do you see instead?
Instead, it fails with linker errors like the following:

ld.gold: error: obj/url/liburl_mojom_for_blink.a(obj/url/gen/url/mojo/url_mojom_for_blink.origin.mojom-blink.o): multiple definition of 'url::mojom::blink::OriginDataView::OriginDataView(url::mojom::blink::internal::Origin_Data*, mojo::internal::SerializationContext*)'
ld.gold: obj/third_party/WebKit/Source/platform/libblink_platform.a(obj/third_party/WebKit/Source/platform/gen/url/mojo/blink_platform.origin.mojom-blink.o): previous definition here

Please use labels and text to provide additional information.
The problem appears to be that both the 'url_mojom_for_blink' and 'blink_platform' GYP targets include origin.mojom-blink.cc. The 'url_mojom_for_blink' target is only included from 'webmessaging_mojo_bindings_for_blink' which was added in http://crrev.com/e69cdae3 (6 days ago). The below patch resolves the linker error for me in limited testing on Linux.

diff --git a/components/webmessaging.gypi b/components/webmessaging.gypi
index 1ea14fb..8020b74 100644
--- a/components/webmessaging.gypi
+++ b/components/webmessaging.gypi
@@ -48,12 +48,6 @@
       'target_name': 'webmessaging_mojo_bindings_for_blink',
       'type': 'static_library',
       'sources': [ '<@(mojom_files)' ],
-      'dependencies': [
-        '../url/url.gyp:url_mojom_for_blink',
-      ],
-      'export_dependent_settings': [
-        '../url/url.gyp:url_mojom_for_blink',
-      ],
       'variables': {
         'for_blink': 'true',
         'mojom_typemaps': [