Change mojo enums to be scoped enums in the generated C++ bindings.

components/web_view/web_view_impl.cc

 // Copyright 2015 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 "components/web_view/web_view_impl.h"
 
 #include <queue>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 237 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // WebViewImpl, NavigationControllerDelegate implementation:
 
 void WebViewImpl::OnNavigate(mojo::URLRequestPtr request) {
   pending_load_.reset(new PendingWebViewLoad(this));
   pending_load_->Init(std::move(request));
 }
 
 void WebViewImpl::OnDidNavigate() {
-  client_->BackForwardChanged(navigation_controller_.CanGoBack()
-                                  ? ButtonState::BUTTON_STATE_ENABLED
-                                  : ButtonState::BUTTON_STATE_DISABLED,
-                              navigation_controller_.CanGoForward()
-                                  ? ButtonState::BUTTON_STATE_ENABLED
-                                  : ButtonState::BUTTON_STATE_DISABLED);
+  client_->BackForwardChanged(
+      navigation_controller_.CanGoBack() ? ButtonState::ENABLED
+                                         : ButtonState::DISABLED,
+      navigation_controller_.CanGoForward() ? ButtonState::ENABLED
+                                            : ButtonState::DISABLED);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // WebViewImpl, FindControllerDelegate implementation:
 
 std::vector<Frame*> WebViewImpl::GetAllFrames() {
   std::vector<Frame*> all_frames;
   PreOrderDepthFirstTraverseTree(frame_tree_->root(), &all_frames);
   return all_frames;
 }
 
 mojom::WebViewClient* WebViewImpl::GetWebViewClient() {
   return client_.get();
 }
 
 }  // namespace web_view