Add card details and legal message to Android save credit card infobar.

components/infobars/core/infobar_manager.h

Index: components/infobars/core/infobar_manager.h
diff --git a/components/infobars/core/infobar_manager.h b/components/infobars/core/infobar_manager.h
index 502edac68a9b7ba6795df303ee4bd9cf558d3cde..43014d41e801d2eba6b5bf201772f3f053f38dac 100644
--- a/components/infobars/core/infobar_manager.h
+++ b/components/infobars/core/infobar_manager.h
@@ -17,6 +17,10 @@
 class ConfirmInfoBarDelegate;
 class GURL;
 
+namespace autofill {
+class AutofillCCInfoBarDelegate;
+}
+
 namespace content {
 class WebContents;
 }
@@ -104,6 +108,10 @@ class InfoBarManager {
   virtual scoped_ptr<infobars::InfoBar> CreateConfirmInfoBar(
       scoped_ptr<ConfirmInfoBarDelegate> delegate) = 0;
 
+  // Returns an autofill credit card saving infobar that owns |delegate|.

[gone, 2016/01/08 00:08:09]

Is there no better way to do this?  I'm not sure why this has to be added only
for this one particular infobar when the other infobar types have gotten by
without it.

[please use gerrit instead, 2016/01/12 00:47:25]

Another way is to add detail_icon(), detail_label(), detail_sub_label(),
legal_message_lines()... to confirm_infobar.h. However, infobar owners (e.g.
Peter) might disagree on whether confirm_infobar.h should contain
mobile-specific elements.

[please use gerrit instead, 2016/01/12 00:49:14]

Ended up making an autofill_save_card_infobar_mobile.h file with
CreatSaveCardInfoBarMobile() function, which is defined in iOS and Android
specific files.

+  virtual scoped_ptr<infobars::InfoBar> CreateAutofillCCInfoBar(
+      scoped_ptr<autofill::AutofillCCInfoBarDelegate> delegate) = 0;
+
   // Opens a URL according to the specified |disposition|.
   virtual void OpenURL(const GURL& url, WindowOpenDisposition disposition) = 0;