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..2545d7b9ee6d6d73c0c8aa3a421d1c20cef61120 100644
--- a/chrome/browser/profiles/profile_impl.cc
+++ b/chrome/browser/profiles/profile_impl.cc
@@ -463,10 +463,16 @@ 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(","));
+      scoped_refptr<extensions::UnpackedInstaller> installer =
+          extensions::UnpackedInstaller::Create(extension_service_.get());
+      while (t.GetNext()) {
+        installer->LoadFromCommandLine(FilePath(t.token()));
+      }
     }
   }