Extend --load-extension commandline to accept multiple (comma-separated) extensions.

chrome/browser/profiles/profile_impl.cc

Index: chrome/browser/profiles/profile_impl.cc
diff --git a/chrome/browser/profiles/profile_impl.cc b/chrome/browser/profiles/profile_impl.cc
index 6574cd7c78e7b50247fd641e1eff7f01cf7a2209..a5f3701ea03993762d6453aad563a328bc54fdb3 100644
--- a/chrome/browser/profiles/profile_impl.cc
+++ b/chrome/browser/profiles/profile_impl.cc
@@ -463,10 +463,15 @@ void ProfileImpl::InitExtensions(bool extensions_enabled) {
     // Load any extensions specified with --load-extension.
     // TODO(yoz): Seems like this should move into ExtensionService::Init.
     if (command_line->HasSwitch(switches::kLoadExtension)) {
-      FilePath path = command_line->GetSwitchValuePath(
+      CommandLine::StringType path_list = command_line->GetSwitchValueNative(
           switches::kLoadExtension);
-      extensions::UnpackedInstaller::Create(extension_service_.get())->
-        LoadFromCommandLine(path);
+      StringTokenizerT<CommandLine::StringType,
+          CommandLine::StringType::const_iterator> t(path_list,
+                                                     FILE_PATH_LITERAL(","));

[asargent_no_longer_on_chrome, 2011/12/14 00:37:45]

I guess if people have commas in their filenames they're out of luck? That's
probably rare enough that we don't care.

[jvoung - send to chromium..., 2011/12/14 03:00:43]

Yeah, I'm not sure what would be a better character...

+      while (t.GetNext()) {
+        extensions::UnpackedInstaller::Create(extension_service_.get())->

[Aaron Boodman, 2011/12/14 00:30:44]

You could create one instance above the beginning of the while loop and use it
repeatedly to make this more readable.

[jvoung - send to chromium..., 2011/12/14 03:00:43]

Done.

+            LoadFromCommandLine(FilePath(t.token()));
+      }
     }
   }