Fix double session-restore bug.

chrome/common/chrome_switches.cc

 // Copyright (c) 2012 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/common/chrome_switches.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "build/build_config.h"
 #include "ppapi/features/features.h"
@@ skipping 728 matching lines @@
 // Specifies the maximum length for a QUIC packet.
 const char kQuicMaxPacketLength[] = "quic-max-packet-length";
 
 // Specifies the version of QUIC to use.
 const char kQuicVersion[] = "quic-version";
 // Porvides a list of addresses to discover DevTools remote debugging targets.
 // The format is <host>:<port>,...,<host>:port.
 const char kRemoteDebuggingTargets[] = "remote-debugging-targets";
 
 // Indicates the last session should be restored on startup. This overrides the
-// preferences value.
+// preferences value. Note that this does not force automatic session restore
+// following a crash, so as to prevent a crash loop. This switch is used to
+// implement support for OS-specific "continue where you left off" functionality
+// on OS X and Windows.
 const char kRestoreLastSession[]            = "restore-last-session";
 
 // Disable saving pages as HTML-only, disable saving pages as HTML Complete
 // (with a directory of sub-resources). Enable only saving pages as MHTML.
 // See http://crbug.com/120416 for how to remove this switch.
 const char kSavePageAsMHTML[]               = "save-page-as-mhtml";
 
 // If true the app list will be shown.
 const char kShowAppList[]                   = "show-app-list";
 
@@ skipping 430 matching lines @@
 
 // -----------------------------------------------------------------------------
 // DO NOT ADD YOUR VERY NICE FLAGS TO THE BOTTOM OF THIS FILE.
 //
 // You were going to just dump your switches here, weren't you? Instead, please
 // put them in alphabetical order above, or in order inside the appropriate
 // ifdef at the bottom. The order should match the header.
 // -----------------------------------------------------------------------------
 
 }  // namespace switches