[DevTools] Migrate android to devtools_discovery.

components/devtools_discovery/devtools_discovery_manager.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/devtools_discovery/devtools_discovery_manager.h"
 
 #include "base/stl_util.h"
 #include "components/devtools_discovery/basic_target_descriptor.h"
 #include "content/public/browser/devtools_agent_host.h"
 
@@ skipping 22 matching lines @@
     return GetDescriptorsFromProviders();
 
   DevToolsAgentHost::List agent_hosts = DevToolsAgentHost::GetOrCreateAll();
   DevToolsTargetDescriptor::List result;
   result.reserve(agent_hosts.size());
   for (const auto& agent_host : agent_hosts)
     result.push_back(new BasicTargetDescriptor(agent_host));
   return result;
 }
 
+void DevToolsDiscoveryManager::SetCreateCallback(
+    const CreateCallback& callback) {
+  create_callback_ = callback;
+}
+
+scoped_ptr<DevToolsTargetDescriptor>
+DevToolsDiscoveryManager::CreateNew(const GURL& url) {
+  if (create_callback_.is_null())
+    return scoped_ptr<DevToolsTargetDescriptor>();
+  return create_callback_.Run(url);
+}
+
 DevToolsTargetDescriptor::List
 DevToolsDiscoveryManager::GetDescriptorsFromProviders() {
   DevToolsTargetDescriptor::List result;
   for (const auto& provider : providers_) {
     DevToolsTargetDescriptor::List partial = provider->GetDescriptors();
     result.insert(result.begin(), partial.begin(), partial.end());
   }
   return result;
 }
 
 }  // namespace devtools_discovery