Remove --disable-restore-session-state.

The feature has been stable a long time now.

(This CL is part of the command line flag removal effort.)

BUG=

Review URL: https://codereview.chromium.org/190603002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255682 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/about_flags.cc

@@ -845,13 +845,6 @@ const Experiment kExperiments[] = {
     kOsAll,
     SINGLE_VALUE_TYPE_AND_VALUE(switches::kJavaScriptFlags, "--harmony")
   },
-  {
-    "disable-restore-session-state",
-    IDS_FLAGS_DISABLE_RESTORE_SESSION_STATE_NAME,
-    IDS_FLAGS_DISABLE_RESTORE_SESSION_STATE_DESCRIPTION,
-    kOsAll,
-    SINGLE_VALUE_TYPE(switches::kDisableRestoreSessionState)
-  },
   {
     "disable-software-rasterizer",
     IDS_FLAGS_DISABLE_SOFTWARE_RASTERIZER_NAME,

chrome/browser/profiles/profile_impl.cc

@@ -595,12 +595,9 @@ void ProfileImpl::DoFinalInit() {
         base::Bind(&EnsureReadmeFile, GetPath()),
         base::TimeDelta::FromMilliseconds(create_readme_delay_ms));
 
-  if (!CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kDisableRestoreSessionState)) {
-    TRACE_EVENT0("browser", "ProfileImpl::SetSaveSessionStorageOnDisk")
-    content::BrowserContext::GetDefaultStoragePartition(this)->
-        GetDOMStorageContext()->SetSaveSessionStorageOnDisk();
-  }
+  TRACE_EVENT0("browser", "ProfileImpl::SetSaveSessionStorageOnDisk");
+  content::BrowserContext::GetDefaultStoragePartition(this)->
+      GetDOMStorageContext()->SetSaveSessionStorageOnDisk();
 
   // Creation has been finished.
   if (delegate_) {

chrome/common/chrome_switches.cc

@@ -426,10 +426,6 @@ const char kDisableQuicPortSelection[]      = "disable-quic-port-selection";
 const char kDisableRestoreBackgroundContents[] =
     "disable-restore-background-contents";
 
-// Disables restoring session state (cookies, session storage, etc.) when
-// restoring the browsing session.
-const char kDisableRestoreSessionState[]    = "disable-restore-session-state";
-
 // Disables throttling prints initiated by scripts.
 const char kDisableScriptedPrintThrottling[] =
     "disable-scripted-print-throttling";

chrome/common/chrome_switches.h

@@ -125,7 +125,6 @@ extern const char kDisableQuicHttps[];
 extern const char kDisableQuicPacing[];
 extern const char kDisableQuicPortSelection[];
 extern const char kDisableRestoreBackgroundContents[];
-extern const char kDisableRestoreSessionState[];
 extern const char kDisableSearchButtonInOmnibox[];
 extern const char kDisableScriptedPrintThrottling[];
 extern const char kDisableSpdy31[];