Make TabContents ctor private; poke hole for existing callers.

chrome/browser/ui/cocoa/infobars/translate_infobar_unittest.mm

Index: chrome/browser/ui/cocoa/infobars/translate_infobar_unittest.mm
diff --git a/chrome/browser/ui/cocoa/infobars/translate_infobar_unittest.mm b/chrome/browser/ui/cocoa/infobars/translate_infobar_unittest.mm
index fafdca57fdd90a8f13b3540b6d52a595ce619f34..d0b3205e8608d23e376a61e29afcc6bc62603982 100644
--- a/chrome/browser/ui/cocoa/infobars/translate_infobar_unittest.mm
+++ b/chrome/browser/ui/cocoa/infobars/translate_infobar_unittest.mm
@@ -23,6 +23,14 @@
 
 using content::WebContents;
 
+// TODO(avi): Kill this when TabContents goes away.
+class TranslationInfoBarTestContentsCreator {
+ public:
+  static TabContents* CreateTabContents(content::WebContents* contents) {
+    return TabContents::Factory::CreateTabContents(contents);
+  }
+};
+
 namespace {
 
 // All states the translate toolbar can assume.
@@ -76,8 +84,9 @@ class TranslationInfoBarTest : public CocoaProfileTest {
   // the test.
   virtual void SetUp() {
     CocoaProfileTest::SetUp();
-    tab_contents_.reset(new TabContents(WebContents::Create(
-       profile(), NULL, MSG_ROUTING_NONE, NULL)));
+    tab_contents_.reset(
+        TranslationInfoBarTestContentsCreator::CreateTabContents(
+            WebContents::Create(profile(), NULL, MSG_ROUTING_NONE, NULL)));
     CreateInfoBar();
   }