[IME] Differentiate s_suppressNextKeypressEvent in WebViewImpl.

Source/web/WebViewImpl.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 680 matching lines @@
 
     bool m_ignoreInputEvents;
 
     float m_compositorDeviceScaleFactorOverride;
     WebSize m_rootLayerOffset;
     float m_rootLayerScale;
 
     // Webkit expects keyPress events to be suppressed if the associated keyDown
     // event was handled. Safari implements this behavior by peeking out the
     // associated WM_CHAR event if the keydown was handled. We emulate
-    // this behavior by setting this flag if the keyDown was handled.
-    bool m_suppressNextKeypressEvent;
+    // this behavior by storing a state to indicate that keyDown has been handled,
+    // and so that the following keyPress event should be suppressed.
+    enum SuppressNextKeypressEvent {
+        Suppress_None, // Don't suppress.
+        Suppress_KeyEventCanceled, // Key event was canceled.
+        Suppress_KeyEventHandled // Key event was handled.
+    };
+    SuppressNextKeypressEvent m_suppressNextKeypressEvent;
 
     // Represents whether or not this object should process incoming IME events.
     bool m_imeAcceptEvents;
 
     // The available drag operations (copy, move link...) allowed by the source.
     WebDragOperation m_operationsAllowed;
 
     // The current drag operation as negotiated by the source and destination.
     // When not equal to DragOperationNone, the drag data can be dropped onto the
     // current drop target in this WebView (the drop target can accept the drop).
@@ skipping 56 matching lines @@
 };
 
 DEFINE_TYPE_CASTS(WebViewImpl, WebWidget, widget, widget->isWebView(), widget.isWebView());
 // We have no ways to check if the specified WebView is an instance of
 // WebViewImpl because WebViewImpl is the only implementation of WebView.
 DEFINE_TYPE_CASTS(WebViewImpl, WebView, webView, true, true);
 
 } // namespace blink
 
 #endif