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

components/devtools_discovery/basic_target_descriptor.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/basic_target_descriptor.h"
 
 #include "content/public/browser/devtools_agent_host.h"
 #include "content/public/browser/favicon_status.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/web_contents.h"
@@ skipping 29 matching lines @@
     scoped_refptr<DevToolsAgentHost> agent_host)
     : agent_host_(agent_host),
       type_(GetTypeFromAgentHost(agent_host.get())),
       title_(agent_host->GetTitle()),
       url_(agent_host->GetURL()) {
   if (content::WebContents* web_contents = agent_host_->GetWebContents()) {
     content::NavigationController& controller = web_contents->GetController();
     content::NavigationEntry* entry = controller.GetActiveEntry();
     if (entry != NULL && entry->GetURL().is_valid())
       favicon_url_ = entry->GetFavicon().url;
-    last_active_time_ = web_contents->GetLastActiveTime();
+    last_activity_time_ = web_contents->GetLastActiveTime();
   }
 }
 
 BasicTargetDescriptor::~BasicTargetDescriptor() {
 }
 
 std::string BasicTargetDescriptor::GetId() const {
   return agent_host_->GetId();
 }
 
@@ skipping 14 matching lines @@
 }
 
 GURL BasicTargetDescriptor::GetURL() const {
   return url_;
 }
 
 GURL BasicTargetDescriptor::GetFaviconURL() const {
   return favicon_url_;
 }
 
-base::Time BasicTargetDescriptor::GetLastActiveTime() const {
-  return last_active_time_;
+base::TimeTicks BasicTargetDescriptor::GetLastActivityTime() const {
+  return last_activity_time_;
 }
 
 bool BasicTargetDescriptor::IsAttached() const {
   return agent_host_->IsAttached();
 }
 
 scoped_refptr<DevToolsAgentHost> BasicTargetDescriptor::GetAgentHost() const {
   return agent_host_;
 }
 
 bool BasicTargetDescriptor::Activate() const {
   return agent_host_->Activate();
 }
 
 bool BasicTargetDescriptor::Close() const {
   return agent_host_->Close();
 }
 
 }  // namespace devtools_discovery