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|.

[Peter Kasting, 2016/01/08 00:34:31]

There has to be a better place for this.  This sort of very specific method
doesn't belong in a general class such as InfoBarManager.  It's doubly
concerning that major platforms like views don't even use an infobar for this. 
It feels like the entire idea that there is a specific "autofill infobar"
shouldn't be in components/.

I'm also looking at the stuff added to AutofillCCInfoBarDelegate and wondering
if it's ever going to be used outside this platform-specific AutofillInfoBar. 
I'm beginning to think that class shouldn't be changed either, and we should
either have some kind of subclass or some entirely unrelated class to handle the
Android-specific needs here.

[please use gerrit instead, 2016/01/12 00:47:26]

Created components/autofill/core/browser/autofill_save_card_infobar_mobile.h
with CreateSaveCardInfoBarMobile() function. It's defined only on iOS and
Android.
Moved mobile-specific modifications into AutofillSaveCardInfoBarDelegateMobile.

+  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;