Mojo bindings: Fix typemap includes.

mojo/public/cpp/bindings/tests/BUILD.gn

 # Copyright 2014 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("../../../mojo_application.gni")
 
 source_set("tests") {
   testonly = true
 
   sources = [
@@ skipping 16 matching lines @@
     "map_unittest.cc",
     "message_queue.cc",
     "message_queue.h",
     "multiplex_router_unittest.cc",
     "pickle_unittest.cc",
     "pickled_struct_blink.cc",
     "pickled_struct_blink.h",
     "pickled_struct_chromium.cc",
     "pickled_struct_chromium.h",
 
     # TODO: crbug.com/596202

[yzshen1, 2016/03/22 17:43:32]

Uncomment and update these files?

One question: it seems we don't express things like
rect_blink.h/rect_blink_traits.h as input explicitly for any build target. If
those files are changed, we will fail to re-compile affected targets, right?

[Sam McNally, 2016/03/22 19:22:03]

Done.
Yes. I expect we will need to add "typemap_sources" to mojom to correctly
specify dependencies. Strict dependency enforcement of includes would be so
nice.

[yzshen1, 2016/03/22 20:29:13]

Yeah.
I am concerned that without such enforcement we will easily run into annoying
compilation issues. 

     #"rect_blink.h",
     #"rect_chromium.h",
     "request_response_unittest.cc",
     "router_test_util.cc",
     "router_test_util.h",
     "router_unittest.cc",
     "sample_service_unittest.cc",
     "serialization_warning_unittest.cc",
     "stl_converters_unittest.cc",
     "string_unittest.cc",
 
     #"struct_traits_unittest.cc",
     "struct_unittest.cc",
     "struct_with_traits_impl.cc",
     "struct_with_traits_impl.h",
+    "struct_with_traits_impl_traits.cc",
+    "struct_with_traits_impl_traits.h",
     "sync_method_unittest.cc",
     "type_conversion_unittest.cc",
     "union_unittest.cc",
     "validation_unittest.cc",
     "variant_test_util.h",
   ]
 
   deps = [
     ":mojo_public_bindings_test_utils",
     "//mojo/message_pump",
@@ skipping 59 matching lines @@
 source_set("mojo_public_bindings_test_utils") {
   sources = [
     "validation_test_input_parser.cc",
     "validation_test_input_parser.h",
   ]
 
   deps = [
     "//mojo/public/c/system",
   ]
 }