Support an --install-from-webstore command line switch

chrome/browser/chrome_browser_main.cc

Index: chrome/browser/chrome_browser_main.cc
diff --git a/chrome/browser/chrome_browser_main.cc b/chrome/browser/chrome_browser_main.cc
index da0a4dcdde28a512c134da94e642b124fc2c8be7..a4fecf206b857999ed2d470bb24a535d5289e069 100644
--- a/chrome/browser/chrome_browser_main.cc
+++ b/chrome/browser/chrome_browser_main.cc
@@ -1338,6 +1338,18 @@ int ChromeBrowserMainParts::PreMainMessageLoopRunImpl() {
     return chrome::RESULT_CODE_UNINSTALL_EXTENSION_ERROR;
   }
 
+  if (parsed_command_line().HasSwitch(switches::kAppsInstallFromID)) {
+    const CommandLine& cmdline = parsed_command_line();
+    extensions::StartupHelper helper;
+    if (helper.InstallAppFromID(
+            cmdline.GetSwitchValueASCII(switches::kAppsInstallFromID),

[Mihai Parparita -not on Chrome, 2012/09/07 22:01:36]

Other StartupHelper methods take the whole CommandLine, and extract what they
need from it. It seems more consistent to do that here too.

[asargent_no_longer_on_chrome, 2012/09/14 23:24:35]

Done.

+            profile_))
+      return content::RESULT_CODE_NORMAL_EXIT;
+    else

[Mihai Parparita -not on Chrome, 2012/09/07 22:01:36]

Unnecessary else, given the return above.

[asargent_no_longer_on_chrome, 2012/09/14 23:24:35]

Done.

+      return chrome::RESULT_CODE_INSTALL_APP_FROM_ID_ERROR;
+  }
+
+
   // Start watching for hangs during startup. We disarm this hang detector when
   // ThreadWatcher takes over or when browser is shutdown or when
   // startup_watcher_ is deleted.