[Win] Add a fast profile switcher to the Windows taskbar item.

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 838e7bb93c638ca2d0208688046c9959cd3e8fc6..769d198106070db64fae3e7b423c7c1fbbb64a00 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -1036,6 +1036,10 @@ const char kResetAppListInstallState[]      = "reset-app-list-install-state";
 // sent to the ui_test.
 const char kRestoreLastSession[]            = "restore-last-session";
 
+// If set, Chrome will reuse any existing browsers for a specific profile. Used

[tapted, 2014/11/03 23:57:06]

nit: "reuse" suggests to me that it will open a new tab in that browser, rather
than simply activate it. Maybe kActivateExistingProfileBrowser ?

[noms (inactive), 2014/11/04 20:03:09]

Oh, much better. I had a lot of trouble coming up with a name. Thanks!

+// for example by the fast-user switcher in the Windows JumpList.
+const char kReuseExistingProfileBrowser[]   = "reuse-existing-profile-browser";
+
 // 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.