Don't perform the default action when keyCode is 229.

third_party/WebKit/Source/core/input/KeyboardEventManager.cpp

Index: third_party/WebKit/Source/core/input/KeyboardEventManager.cpp
diff --git a/third_party/WebKit/Source/core/input/KeyboardEventManager.cpp b/third_party/WebKit/Source/core/input/KeyboardEventManager.cpp
index 185a0664514f3bcd94012ca3f4ed2f39c5f549e5..49c6d0b13a2b06180d718245deb200ba586b4b6f 100644
--- a/third_party/WebKit/Source/core/input/KeyboardEventManager.cpp
+++ b/third_party/WebKit/Source/core/input/KeyboardEventManager.cpp
@@ -162,6 +162,11 @@ void KeyboardEventManager::defaultKeyboardEventHandler(
         m_frame->editor().handleKeyboardEvent(event);
         if (event->defaultHandled())
             return;
+
+        // Do not perform the default action when inside a IME composition context.
+        // TODO(dtapuska): Replace this with isComposing support. crbug.com/625686
+        if (event->keyCode() == 229)

[bokan, 2016/07/04 22:52:06]

Does this keyCode have a name of some kind that we could replace 229 with a more
friendly constant?

+            return;
         if (event->key() == "Tab") {
             defaultTabEventHandler(event);
         } else if (event->key() == "Backspace") {