Add deprecation warnings to old powerful features on insecure origins.

Source/core/frame/UseCounter.cpp

 /*
  * Copyright (C) 2012 Google, Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 881 matching lines @@
     case ServiceWorkerClientPostMessage:
         return "'Client.postMessage()' is an experimental API and may change. See https://github.com/slightlyoff/ServiceWorker/issues/609.";
 
     case AttrChildAccess:
     case AttrChildChange:
         return "Attr child nodes are deprecated and will be removed in M45, around August 2015. Please use 'Attr.value' instead.";
 
     case CSSKeyframesRuleInsertRule:
         return "'CSSKeyframesRule.insertRule()' is deprecated and will be removed in M45, around August 2015. Please use 'CSSKeyframesRule.appendRule()' instead.";
 
+    // Powerful features on insecure origins (https://goo.gl/rStTGz)
+    case GeolocationInsecureOrigin:
+        return "Geolocation via getCurrentPosition() and watchPosition() will be deprecated over insecure origins in the future. You should consider switching your application to a secure origin, such as HTTPS. See http://goo.gl/rStTGz for more details.";

[Michael van Ouwerkerk, 2015/04/30 13:15:21]

nit: might as well use https for all the goo.gl links

[jww, 2015/04/30 17:28:45]

For sure. At least I got it right in the comment :-) I should file a bug that
the URL shortener doesn't give HTTPS by default.

+
+    case GetUserMediaInsecureOrigin:
+        return "getUserMedia() will be deprecated over insecure origins in the future. You should consider switching your application to a secure origin, such as HTTPS. See http://goo.gl/rStTGz for more details.";
+
+    case DeviceMotionInsecureOrigin:
+        return "The 'devicemotion' event will be deprecated over insecure origins in the future. You should consider switching your application to a secure origin, such as HTTPS. See http://goo.gl/rStTGz for more details.";
+
+    case FullscreenInsecureOrigin:
+        return "requestFullscreen() will be deprecated over insecure origins in the future. You should consider switching your application to a secure origin, such as HTTPS. See http://goo.gl/rStTGz for more details.";
+
     // Features that aren't deprecated don't have a deprecation message.
     default:
         return String();
     }
 }
 
 void UseCounter::count(CSSParserContext context, CSSPropertyID feature)
 {
     ASSERT(feature >= firstCSSProperty);
     ASSERT(feature <= lastUnresolvedCSSProperty);
@@ skipping 27 matching lines @@
 UseCounter* UseCounter::getFrom(const StyleSheetContents* sheetContents)
 {
     // FIXME: We may want to handle stylesheets that have multiple owners
     //        http://crbug.com/242125
     if (sheetContents && sheetContents->hasSingleOwnerNode())
         return getFrom(sheetContents->singleOwnerDocument());
     return 0;
 }
 
 } // namespace blink