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..59ee1921e92970ad62758ddce2607bd000834750 100644
--- a/third_party/WebKit/Source/core/input/KeyboardEventManager.cpp
+++ b/third_party/WebKit/Source/core/input/KeyboardEventManager.cpp
@@ -24,6 +24,8 @@ namespace blink {
 
 namespace {
 
+const int kVKeyProcessKey = 229;
+
 WebFocusType focusDirectionForKey(const String& key)
 {
     WebFocusType retVal = WebFocusTypeNone;
@@ -162,6 +164,11 @@ 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() == kVKeyProcessKey)
+            return;
         if (event->key() == "Tab") {
             defaultTabEventHandler(event);
         } else if (event->key() == "Backspace") {