CSS Motion Path: report use of deprecated motion* properties

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

Index: third_party/WebKit/Source/core/frame/Deprecation.cpp
diff --git a/third_party/WebKit/Source/core/frame/Deprecation.cpp b/third_party/WebKit/Source/core/frame/Deprecation.cpp
index 07965515e7b6a4c34df7cc4efa683fb63f52bdb3..dffbd0a878f90c1e796699637212074ce6d4a67e 100644
--- a/third_party/WebKit/Source/core/frame/Deprecation.cpp
+++ b/third_party/WebKit/Source/core/frame/Deprecation.cpp
@@ -121,9 +121,18 @@ void Deprecation::warnOnDeprecatedProperties(const LocalFrame* frame, CSSPropert
 
 String Deprecation::deprecationMessage(CSSPropertyID unresolvedProperty)
 {
-    // TODO: Add a switch here when there are properties that we intend to deprecate.
-    // Returning an empty string for now.
-    return emptyString();
+    switch (unresolvedProperty) {
+    case CSSPropertyAliasMotionOffset:
+        return willBeRemoved("motion-offset", M58, "6390764217040896");
+    case CSSPropertyAliasMotionRotation:
+        return willBeRemoved("motion-rotation", M58, "6390764217040896");
+    case CSSPropertyAliasMotionPath:
+    case CSSPropertyMotion:
+        return willBeRemoved("motion-path", M58, "6390764217040896");
+
+    default:
+        return emptyString();
+    }
 }
 
 void Deprecation::countDeprecation(const LocalFrame* frame, UseCounter::Feature feature)