Revert of Change WebContents::last_active_time_ to Time instead of Timeticks.

chrome/browser/android/dev_tools_discovery_provider_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/dev_tools_discovery_provider_android.h"
 
 #include "base/base64.h"
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/compiler_specific.h"
@@ skipping 47 matching lines @@
   }
 
   GURL GetURL() const override {
     return url_;
   }
 
   GURL GetFaviconURL() const override {
     return favicon_url_;
   }
 
-  base::Time GetLastActiveTime() const override { return last_active_time_; }
+  base::TimeTicks GetLastActivityTime() const override {
+    return last_activity_time_;
+  }
 
   std::string GetId() const override {
     return base::IntToString(tab_id_);
   }
 
   std::string GetType() const override {
     return devtools_discovery::BasicTargetDescriptor::kTypePage;
   }
 
   bool IsAttached() const override {
@@ skipping 46 matching lines @@
     model->CloseTabAt(index);
     return true;
   }
 
  private:
   TabDescriptor(int tab_id, WebContents* web_contents)
       : tab_id_(tab_id),
         title_(base::UTF16ToUTF8(web_contents->GetTitle())),
         url_(web_contents->GetURL()),
         favicon_url_(CalculateFaviconURL()),
-        last_active_time_(web_contents->GetLastActiveTime()) {}
+        last_activity_time_(web_contents->GetLastActiveTime()) {
+  }
 
   TabDescriptor(int tab_id, const base::string16& title, const GURL& url)
       : tab_id_(tab_id),
         title_(base::UTF16ToUTF8(title)),
         url_(url),
         favicon_url_(CalculateFaviconURL()) {
   }
 
   GURL CalculateFaviconURL() {
     TabModel* model;
@@ skipping 35 matching lines @@
         }
       }
     }
     return false;
   }
 
   const int tab_id_;
   const std::string title_;
   const GURL url_;
   const GURL favicon_url_;
-  const base::Time last_active_time_;
+  const base::TimeTicks last_activity_time_;
 
   DISALLOW_COPY_AND_ASSIGN(TabDescriptor);
 };
 
 scoped_ptr<devtools_discovery::DevToolsTargetDescriptor>
 CreateNewAndroidTab(const GURL& url) {
   if (TabModelList::empty())
     return scoped_ptr<devtools_discovery::DevToolsTargetDescriptor>();
 
   TabModel* tab_model = TabModelList::get(0);
@@ skipping 61 matching lines @@
 }
 
 // static
 void DevToolsDiscoveryProviderAndroid::Install() {
   devtools_discovery::DevToolsDiscoveryManager* discovery_manager =
       devtools_discovery::DevToolsDiscoveryManager::GetInstance();
   discovery_manager->AddProvider(
       make_scoped_ptr(new DevToolsDiscoveryProviderAndroid()));
   discovery_manager->SetCreateCallback(base::Bind(&CreateNewAndroidTab));
 }