DevTools: remove DevToolsTargetDescriptor and its implementations, we are now based on devtools age…

android_webview/browser/aw_dev_tools_discovery_provider.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 "android_webview/browser/aw_dev_tools_discovery_provider.h"
 
 #include "android_webview/browser/browser_view_renderer.h"
 #include "base/json/json_writer.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/stringprintf.h"
@@ skipping 40 matching lines @@
   discovery_manager->AddProvider(
       base::WrapUnique(new AwDevToolsDiscoveryProvider()));
 }
 
 AwDevToolsDiscoveryProvider::AwDevToolsDiscoveryProvider() {
 }
 
 AwDevToolsDiscoveryProvider::~AwDevToolsDiscoveryProvider() {
 }
 
-devtools_discovery::DevToolsTargetDescriptor::List
+content::DevToolsAgentHost::List
 AwDevToolsDiscoveryProvider::GetDescriptors() {
   DevToolsAgentHost::List agent_hosts = DevToolsAgentHost::GetOrCreateAll();
-  devtools_discovery::DevToolsTargetDescriptor::List result;
-  result.reserve(agent_hosts.size());
   for (auto& agent_host : agent_hosts) {
     agent_host->SetDescriptionOverride(
         GetViewDescription(agent_host->GetWebContents()));
-    result.push_back(new devtools_discovery::BasicTargetDescriptor(agent_host));
   }
-  return result;
+  return agent_hosts;
 }
 
 }  // namespace android_webview