Remove IOThread::creation_time().

It's not currently used, and the class is eventually going away.

Bug: None
Change-Id: Iba2792c54663e155b4515efef02b150cd47f0afd
Reviewed-on: https://chromium-review.googlesource.com/571422Reviewed-by: Eric Noyau <noyau@chromium.org>
Reviewed-by: Ben Greenstein <bengr@chromium.org>
Commit-Queue: Ben Greenstein <bengr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#487329}

chrome/browser/io_thread.cc

@@ -308,7 +308,6 @@ IOThread::IOThread(
       globals_(nullptr),
       is_quic_allowed_by_policy_(true),
       http_09_on_non_default_ports_enabled_(false),
-      creation_time_(base::TimeTicks::Now()),
       weak_factory_(this) {
   scoped_refptr<base::SingleThreadTaskRunner> io_thread_proxy =
       BrowserThread::GetTaskRunnerForThread(BrowserThread::IO);
@@ -750,10 +749,6 @@ void IOThread::DisableQuic() {
         ->DisableQuic();
 }
 
-base::TimeTicks IOThread::creation_time() const {
-  return creation_time_;
-}
-
 net::SSLConfigService* IOThread::GetSSLConfigService() {
   return ssl_config_service_manager_->Get();
 }

chrome/browser/io_thread.h

@@ -20,7 +20,6 @@
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/strings/string_piece.h"
-#include "base/time/time.h"
 #include "build/build_config.h"
 #include "chrome/browser/net/chrome_network_delegate.h"
 #include "chrome/browser/net/system_network_context_manager.h"
@@ -210,8 +209,6 @@ class IOThread : public content::BrowserThreadDelegate {
   // supported for simplicity and requires a browser restart.
   void DisableQuic();
 
-  base::TimeTicks creation_time() const;
-
   // Returns the callback for updating data use prefs.
   metrics::UpdateUsagePrefCallbackType GetMetricsDataUseForwarder();
 
@@ -357,8 +354,6 @@ class IOThread : public content::BrowserThreadDelegate {
   // True if HTTP/0.9 is allowed on non-default ports by policy.
   bool http_09_on_non_default_ports_enabled_;
 
-  const base::TimeTicks creation_time_;
-
   base::WeakPtrFactory<IOThread> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(IOThread);

ios/components/io_thread/ios_io_thread.h

@@ -18,7 +18,6 @@
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
-#include "base/time/time.h"
 #include "components/prefs/pref_member.h"
 #include "components/ssl_config/ssl_config_service_manager.h"
 #include "ios/web/public/web_thread_delegate.h"
@@ -153,8 +152,6 @@ class IOSIOThread : public web::WebThreadDelegate {
 
   const net::HttpNetworkSession::Params& NetworkSessionParams() const;
 
-  base::TimeTicks creation_time() const;
-
  protected:
   // A string describing the current application version. For example: "stable"
   // or "dev". An empty string is an acceptable value. This string is used to
@@ -225,8 +222,6 @@ class IOSIOThread : public web::WebThreadDelegate {
   scoped_refptr<SystemURLRequestContextGetter>
       system_url_request_context_getter_;
 
-  const base::TimeTicks creation_time_;
-
   base::WeakPtrFactory<IOSIOThread> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(IOSIOThread);

ios/components/io_thread/ios_io_thread.mm

@@ -237,7 +237,6 @@ IOSIOThread::IOSIOThread(PrefService* local_state,
                          net_log::ChromeNetLog* net_log)
     : net_log_(net_log),
       globals_(nullptr),
-      creation_time_(base::TimeTicks::Now()),
       weak_factory_(this) {
   pref_proxy_config_tracker_ =
       ProxyServiceFactory::CreatePrefProxyConfigTrackerOfLocalState(
@@ -413,10 +412,6 @@ const net::HttpNetworkSession::Params& IOSIOThread::NetworkSessionParams()
   return params_;
 }
 
-base::TimeTicks IOSIOThread::creation_time() const {
-  return creation_time_;
-}
-
 net::SSLConfigService* IOSIOThread::GetSSLConfigService() {
   return ssl_config_service_manager_->Get();
 }