Deprecation warnings can cite M57/M58/M59

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 9debda427c03f174081b97f6921f786a1dbaebfc..6b7bdf860768d568065b666e066cde9b7c9f2534 100644
--- a/third_party/WebKit/Source/core/frame/Deprecation.cpp
+++ b/third_party/WebKit/Source/core/frame/Deprecation.cpp
@@ -31,9 +31,15 @@ const char* milestoneString(int milestone)
     case 54:
         return "M54, around October 2016";
     case 55:
-        return "M55, around November 2016";
+        return "M55, around December 2016";
     case 56:
         return "M56, around January 2017";
+    case 57:
+        return "M57, around March 2017";
+    case 58:
+        return "M58, around April 2017";
+    case 59:
+        return "M59, around June 2017";
     }
 
     ASSERT_NOT_REACHED();