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

chrome/browser/ui/startup/startup_browser_creator.cc

Index: chrome/browser/ui/startup/startup_browser_creator.cc
diff --git a/chrome/browser/ui/startup/startup_browser_creator.cc b/chrome/browser/ui/startup/startup_browser_creator.cc
index 381f26533567411023af064022ddddb521e9decb..7eebb2000c48aa122135a317b398d51dea2a1490 100644
--- a/chrome/browser/ui/startup/startup_browser_creator.cc
+++ b/chrome/browser/ui/startup/startup_browser_creator.cc
@@ -746,6 +746,19 @@ void StartupBrowserCreator::ProcessCommandLineAlreadyRunning(
     return;
   }
 
+  // If the profile is loaded and the --activate-existing-profile-browser flag
+  // is used, activate one of the profile's browser windows, if one exists.
+  // Continuing to process the command line is not needed, since this will
+  // end up opening a new browser window.
+  if (command_line.HasSwitch(switches::kActivateExistingProfileBrowser)) {

[sky, 2014/11/10 23:28:25]

How do you know there isn't anything else interesting on the command line that
needs processing?

[noms (inactive), 2014/11/12 19:04:11]

This was originally in ProcessCmdLineImpl, but tapted@ suggested i moved it
here. Moved it back to ProcessCmdLineImpl.

+    Browser* browser = chrome::FindTabbedBrowser(
+        profile, false, chrome::HOST_DESKTOP_TYPE_NATIVE);
+    if (browser) {
+      browser->window()->Activate();
+      return;
+    }
+  }
+
   ProcessCmdLineImpl(command_line, cur_dir, false, profile, Profiles(), NULL,
                      NULL);
 }