DevTools: return remote debugging targets sorted by last active time (as it was long ago).

chrome/browser/android/devtools_manager_delegate_android.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 "chrome/browser/android/devtools_manager_delegate_android.h"
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 94 matching lines @@
 
   bool Close() override {
     TabModel* model;
     int index;
     if (!FindTab(&model, &index))
       return false;
     model->CloseTabAt(index);
     return true;
   }
 
+  base::TimeTicks GetLastActivityTime() override {
+    return agent_host_ ? agent_host_->GetLastActivityTime() : base::TimeTicks();
+  }
+
   void SendMessageToBackend(const std::string& message) override {
     if (agent_host_)
       agent_host_->DispatchProtocolMessage(this, message);
   }
 
  private:
   void MaterializeAgentHost() {
     if (agent_host_)
       return;
     TabModel* model;
@@ skipping 137 matching lines @@
 
 void DevToolsManagerDelegateAndroid::DevToolsAgentHostAttached(
     content::DevToolsAgentHost* agent_host) {
   network_protocol_handler_->DevToolsAgentStateChanged(agent_host, true);
 }
 
 void DevToolsManagerDelegateAndroid::DevToolsAgentHostDetached(
     content::DevToolsAgentHost* agent_host) {
   network_protocol_handler_->DevToolsAgentStateChanged(agent_host, false);
 }