Remove webkit-background-composite

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 38 matching lines @@
 
     String message = deprecationMessage(unresolvedProperty);
     if (!message.isEmpty()) {
         host->deprecation().suppress(unresolvedProperty);
         frame->console().addMessage(ConsoleMessage::create(DeprecationMessageSource, WarningMessageLevel, message));
     }
 }
 
 String Deprecation::deprecationMessage(CSSPropertyID unresolvedProperty)
 {
-    switch (unresolvedProperty) {
-    case CSSPropertyWebkitBackgroundComposite:
-        return willBeRemoved("'-webkit-background-composite'", 51, "6607299456008192");
-    default:
-        return emptyString();
-    }
+    // TODO: Add a switch here when there are properties that we intend to deprecate.
+    // Returning an empty string for now.
+    return emptyString();
 }
 
 void Deprecation::countDeprecation(const LocalFrame* frame, UseCounter::Feature feature)
 {
     if (!frame)
         return;
     FrameHost* host = frame->host();
     if (!host)
         return;
 
@@ skipping 265 matching lines @@
     case UseCounter::HTMLKeygenElement:
         return willBeRemoved("The <keygen> element", 54, "5716060992962560");
 
     // Features that aren't deprecated don't have a deprecation message.
     default:
         return String();
     }
 }
 
 } // namespace blink