Move BluetoothEventRouterTest to extensions_unittests suite

extensions/browser/test_extensions_browser_client.cc

Index: extensions/browser/test_extensions_browser_client.cc
diff --git a/extensions/browser/test_extensions_browser_client.cc b/extensions/browser/test_extensions_browser_client.cc
index e21bc7620e1cbc6913c136bcfdfb183f7469b691..986675437386b0bc20583da8588bf51b2371379e 100644
--- a/extensions/browser/test_extensions_browser_client.cc
+++ b/extensions/browser/test_extensions_browser_client.cc
@@ -17,7 +17,8 @@ TestExtensionsBrowserClient::TestExtensionsBrowserClient(
     BrowserContext* main_context)
     : main_context_(main_context),
       incognito_context_(NULL),
-      process_manager_delegate_(NULL) {
+      process_manager_delegate_(NULL),
+      extension_system_factory_(NULL) {
   DCHECK(main_context_);
   DCHECK(!main_context_->IsOffTheRecord());
 }