Convert WindowOpenDisposition to an enum class.

blimp/engine/session/blimp_engine_session.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 "blimp/engine/session/blimp_engine_session.h"
 
 #include <string>
 #include <utility>
 
 #include "base/command_line.h"
@@ skipping 497 matching lines @@
                                         const gfx::Rect& initial_rect,
                                         bool user_gesture,
                                         bool* was_blocked) {
   NOTIMPLEMENTED();
 }
 
 content::WebContents* BlimpEngineSession::OpenURLFromTab(
     content::WebContents* source,
     const content::OpenURLParams& params) {
   // CURRENT_TAB is the only one we implement for now.
-  if (params.disposition != CURRENT_TAB) {
+  if (params.disposition != WindowOpenDisposition::CURRENT_TAB) {
     NOTIMPLEMENTED();
     return nullptr;
   }
 
   // TODO(haibinlu): Add helper method to get LoadURLParams from OpenURLParams.
   content::NavigationController::LoadURLParams load_url_params(params.url);
   load_url_params.source_site_instance = params.source_site_instance;
   load_url_params.referrer = params.referrer;
   load_url_params.frame_tree_node_id = params.frame_tree_node_id;
   load_url_params.transition_type = params.transition;
@@ skipping 51 matching lines @@
     parent->AddChild(content);
   content->Show();
 
   tab_ = base::MakeUnique<Tab>(std::move(new_contents), target_tab_id,
                                &render_widget_feature_,
                                navigation_message_sender_.get());
 }
 
 }  // namespace engine
 }  // namespace blimp