Add deprecation messages to deprecated parts of the WebVR API.

third_party/WebKit/Source/core/frame/Deprecation.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/frame/Deprecation.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/frame/FrameConsole.h"
 #include "core/frame/FrameHost.h"
@@ skipping 382 matching lines @@
         return willBeRemoved("Web Audio autoplay (without user gesture) from cross-origin iframes", M55, "6406908126691328");
 
     case UseCounter::ScriptInvalidTypeOrLanguage:
         return willBeRemoved("Fetching scripts with an invalid type/language attributes", M56, "5760718284521472");
 
     // The PaymentAddress.careOf was deprecated and then will be removed in M56.
     // Please see: https://www.chromestatus.com/features/5728579069411328
     case UseCounter::PaymentAddressCareOf:
         return willBeRemoved("PaymentAddress.careOf", M56, "5728579069411328");
 
+    case UseCounter::VRDeprecatedFieldOfView:
+        return String::format("VREyeParameters.fieldOfView is deprecated and will be removed in %s.  Prefer using the projection matrices provided by VRFrameData instead.  See https://www.chromestatus.com/features/4532810371039232 for more details.", milestoneString(M57));

[ddorwin, 2016/10/05 21:32:43]

WouldreplacedBy work?

The chromestatus URL doesn't appear to have useful information for this specific
case, so we probably don't need that.

We lose the milestone, but that's not necessarily a bad thing.

[billorr, 2016/10/05 21:55:27]

Sure - I can switch to that if we don't need the milestone.

[billorr, 2016/10/05 22:47:55]

Done.

+
+    case UseCounter::VRDeprecatedGetPose:
+        return String::format("VRDisplay.getPose() is deprecated and will be removed in %s.  Prefer using VRDisplay.getFrameData() instead.  See https://www.chromestatus.com/features/4532810371039232 for more details.", milestoneString(M57));

[ddorwin, 2016/10/05 21:32:43]

ditto

[billorr, 2016/10/05 21:55:27]

Acknowledged.

[billorr, 2016/10/05 22:47:55]

Done.

+
     // Features that aren't deprecated don't have a deprecation message.
     default:
         return String();
     }
 }
 
 } // namespace blink