Merge "Selection API: Show a deprecation message for a quirky addRange() behavior." to M57 branch

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 e24986b6541c09b22889eaf10cd6546a016d2301..85a06f66c4fa2848a49ca3112530b0a66fdaf5de 100644
--- a/third_party/WebKit/Source/core/frame/Deprecation.cpp
+++ b/third_party/WebKit/Source/core/frame/Deprecation.cpp
@@ -434,6 +434,12 @@ String Deprecation::deprecationMessage(UseCounter::Feature feature) {
       return willBeRemoved("FileReaderSync in service workers", M59,
                            "5739144722513920");
 
+    case UseCounter::SelectionAddRangeIntersect:
+      return willBeRemoved(
+          "The behavior that Selection.addRange() merges existing Range and "
+          "the specified Range",
+          M58, "6680566019653632");
+
     // Features that aren't deprecated don't have a deprecation message.
     default:
       return String();