Remove setting cancelBubble to false.

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 07966da0a2cc21a091c2b2102b5f5f9efe966eba..36a7677dd3b54f66e5baeb2d6284a878536d8f91 100644
--- a/third_party/WebKit/Source/core/frame/Deprecation.cpp
+++ b/third_party/WebKit/Source/core/frame/Deprecation.cpp
@@ -407,6 +407,10 @@ String Deprecation::deprecationMessage(UseCounter::Feature feature) {
           "-internal-media-controls-text-track-list* selectors", M59,
           "5661431349379072");
 
+    case UseCounter::EventCancelBubbleWasChangedToFalse:
+      return willBeRemoved("Setting cancelBubble to false", M59,

[foolip, 2017/01/24 04:34:11]

I think this will be misleading, because the change will have already been made.
In
https://groups.google.com/a/chromium.org/d/msg/blink-dev/GO7hv2yuhqM/jFy1WoR5...
rbyers@ was fine with skipping the deprecation period and that seems OK I think.

[lpy, 2017/01/24 21:46:05]

Done.

+                           "6091485216768000");
+
     // Features that aren't deprecated don't have a deprecation message.
     default:
       return String();