Fix extensions targets building without chrome

extensions/BUILD.gn

 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//extensions/features/features.gni")
 import("//testing/test.gni")
 import("//tools/grit/grit_rule.gni")
 import("//tools/grit/repack.gni")
 
 assert(enable_extensions)
 
@@ skipping 34 matching lines @@
     "grit/extensions_renderer_resources.h",
     "extensions_renderer_resources.pak",
   ]
   grit_flags = [
     "-E",
     "mojom_root=" + rebase_path(root_gen_dir),
   ]
 
   deps = [
     "//chrome/browser/media/router:mojo_bindings__generator",
+    "//chrome/browser/media/router:mojo_bindings_common",

[Devlin, 2017/04/11 23:02:56]

Does mojo_bindings_common__generator work?

[michaelpg, 2017/04/12 00:03:29]

It does! It only adds two .stamp files to the generated build line. What I had
adds a LOT more.

Some day I'll learn what STAMP does. and then how these bindings are generated.

     "//device/serial:serial_mojo__generator",
     "//extensions/common:mojo__generator",
     "//extensions/common/api:mojom__generator",
     "//mojo/common:common_custom_types__generator",
     "//net/interfaces:interfaces__generator",
     "//url/mojo:url_mojom_gurl__generator",
     "//url/mojo:url_mojom_origin__generator",
   ]
 }
 
@@ skipping 293 matching lines @@
     "//testing/gtest",
     "//third_party/hunspell",
     "//third_party/icu",
     "//third_party/libpng",
     "//third_party/zlib",
     "//ui/base:test_support",
     "//ui/resources:ui_test_pak",
     "//ui/web_dialogs:test_support",
   ]
 }