A quick fix for Issue 15531 and 10953...

webkit/api/src/gtk/WebInputEventFactory.cpp

Index: webkit/api/src/gtk/WebInputEventFactory.cpp
===================================================================
--- webkit/api/src/gtk/WebInputEventFactory.cpp	(revision 19568)
+++ webkit/api/src/gtk/WebInputEventFactory.cpp	(working copy)
@@ -214,7 +214,7 @@
     return result;
 }
 
-WebKeyboardEvent WebInputEventFactory::keyboardEvent(wchar_t character, double timeStampSeconds)
+WebKeyboardEvent WebInputEventFactory::keyboardEvent(wchar_t character, int state, double timeStampSeconds)
 {
     // keyboardEvent(const GdkEventKey*) depends on the GdkEventKey object and
     // it is hard to use/ it from signal handlers which don't use GdkEventKey
@@ -224,6 +224,7 @@
     WebKeyboardEvent result;
     result.type = WebKit::WebInputEvent::Char;
     result.timeStampSeconds = timeStampSeconds;
+    result.modifiers = gdkStateToWebEventModifiers(state);
     result.windowsKeyCode = character;
     result.nativeKeyCode = character;
     result.text[0] = character;