[Events] Propagate IME composition event to JS on Android.

Source/core/events/KeyboardEvent.cpp

Index: Source/core/events/KeyboardEvent.cpp
diff --git a/Source/core/events/KeyboardEvent.cpp b/Source/core/events/KeyboardEvent.cpp
index ac7ae1f7ad51bd6b10b7387839bb4dd0d16d4968..dbf12a9f88cb4eb07ed149269e520e66474b7be2 100644
--- a/Source/core/events/KeyboardEvent.cpp
+++ b/Source/core/events/KeyboardEvent.cpp
@@ -163,6 +163,14 @@ int KeyboardEvent::keyCode() const
     // We match IE.
     if (!m_keyEvent)
         return 0;
+
+#if OS(ANDROID)
+    // FIXME: Check to see if this applies to other OS.
+    // If the key event belongs to IME composition then propagate to JS.
+    if (m_keyEvent->nativeVirtualKeyCode() == 0xE5) // VKEY_PROCESSKEY
+        return m_keyEvent->nativeVirtualKeyCode();
+#endif
+
     if (type() == EventTypeNames::keydown || type() == EventTypeNames::keyup)
         return windowsVirtualKeyCodeWithoutLocation(m_keyEvent->windowsVirtualKeyCode());