[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..98e70ab4f99523737fa576b7f267a2ed1dd2f89f 100644
--- a/Source/core/events/KeyboardEvent.cpp
+++ b/Source/core/events/KeyboardEvent.cpp
@@ -28,6 +28,14 @@
 
 namespace blink {
 
+namespace {
+
+#if OS(ANDROID)
+int kInputMethodEditorCompositionKeyCode = 229;

[bcwhite, 2015/01/12 21:02:44]

Is this constant available anywhere else already or can it be read from Android
SDK code?

[huangs, 2015/01/12 23:25:57]

Searched for 229 and 0xE5.  Something close is

https://code.google.com/p/chromium/codesearch#chromium/src/content/shell/rend...

which calls it VKEY_PROCESSKEY, but still defines it anyway.

Copying the style to reduce delta, and to facilitate future refactoring.

+#endif
+
+} // namespace
+
 static inline const AtomicString& eventTypeForKeyboardEventType(PlatformEvent::Type type)
 {
     switch (type) {
@@ -163,6 +171,13 @@ int KeyboardEvent::keyCode() const
     // We match IE.
     if (!m_keyEvent)
         return 0;
+
+#if OS(ANDROID)

[bcwhite, 2015/01/12 21:02:44]

// TODO: Check if this applies to other OS

[huangs, 2015/01/12 23:25:57]

Done (using FIXME instead).

+    // If the key event belongs to IME composition then propagate to JS.
+    if (m_keyEvent->nativeVirtualKeyCode() == kInputMethodEditorCompositionKeyCode)
+        return kInputMethodEditorCompositionKeyCode;
+#endif
+
     if (type() == EventTypeNames::keydown || type() == EventTypeNames::keyup)
         return windowsVirtualKeyCodeWithoutLocation(m_keyEvent->windowsVirtualKeyCode());