Allow Mojo structs as map keys

mojo/public/cpp/bindings/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.
 
 static_library("bindings") {
   sources = [
     "array.h",
     "array_data_view.h",
     "array_traits.h",
     "array_traits_carray.h",
@@ skipping 32 matching lines @@
     "lib/clone_equals_util.h",
     "lib/connector.cc",
     "lib/control_message_handler.cc",
     "lib/control_message_handler.h",
     "lib/control_message_proxy.cc",
     "lib/control_message_proxy.h",
     "lib/filter_chain.cc",
     "lib/fixed_buffer.cc",
     "lib/fixed_buffer.h",
     "lib/handle_interface_serialization.h",
+    "lib/hash_util.h",
     "lib/interface_endpoint_client.cc",
     "lib/interface_ptr_state.h",
     "lib/map_data_internal.h",
     "lib/map_serialization.h",
     "lib/message.cc",
     "lib/message_buffer.cc",
     "lib/message_buffer.h",
     "lib/message_builder.cc",
     "lib/message_builder.h",
     "lib/message_header_validator.cc",
@@ skipping 84 matching lines @@
 }
 
 if (!is_ios) {
   # TODO(yzshen): crbug.com/617718 Consider moving this into blink.
   source_set("wtf_support") {
     sources = [
       "array_traits_wtf.h",
       "array_traits_wtf_vector.h",
       "lib/string_traits_wtf.cc",
       "lib/wtf_clone_equals_util.h",
+      "lib/wtf_hash_util.h",
       "lib/wtf_serialization.h",
       "map_traits_wtf.h",
       "map_traits_wtf_hash_map.h",
       "string_traits_wtf.h",
       "wtf_array.h",
       "wtf_map.h",
     ]
 
     public_deps = [
       ":bindings",
       "//third_party/WebKit/Source/wtf",
     ]
 
     public_configs = [ "//third_party/WebKit/Source:config" ]
   }
 }