Add frame-specific InterfaceProviderSpec.

ios/web/web_state/web_state_impl.mm

 // Copyright 2013 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.
 
 #include "ios/web/web_state/web_state_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/metrics/histogram_macros.h"
@@ skipping 526 matching lines @@
   // cookies or not. Currently, only downloads without cookies are supported.
   // |bypass_cache| is ignored since the downloads never go through a cache.
   DCHECK(is_favicon);
   return [[web_controller_ delegate] downloadImageAtUrl:url
                                           maxBitmapSize:max_bitmap_size
                                               callback:callback];
 }
 
 service_manager::InterfaceRegistry* WebStateImpl::GetMojoInterfaceRegistry() {
   if (!mojo_interface_registry_) {
-    mojo_interface_registry_.reset(new service_manager::InterfaceRegistry(
-        service_manager::Identity(), service_manager::InterfaceProviderSpec()));
+    mojo_interface_registry_.reset(
+        new service_manager::InterfaceRegistry(std::string()));
   }
   return mojo_interface_registry_.get();
 }
 
 base::WeakPtr<WebState> WebStateImpl::AsWeakPtr() {
   return weak_factory_.GetWeakPtr();
 }
 
 #pragma mark - WebState implementation
 
@@ skipping 143 matching lines @@
     const LoadCommittedDetails& load_details) {
   for (auto& observer : observers_)
     observer.NavigationItemCommitted(load_details);
 }
 
 WebState* WebStateImpl::GetWebState() {
   return this;
 }
 
 }  // namespace web