A quick fix for Issue 15971....

chrome/browser/renderer_host/render_widget_host_view_gtk.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/renderer_host/render_widget_host_view_gtk.h"
 
 #include <gtk/gtk.h>
 #include <gdk/gdk.h>
 #include <gdk/gdkkeysyms.h>
 #include <gdk/gdkx.h>
@@ skipping 127 matching lines @@
     // TODO(hbono): we should not dispatch a key event when the input focus
     // is in a password input?
     if (!gtk_im_context_filter_keypress(host_view->im_context_, event)) {
       // The GtkIMContext object cannot handle this key event.
       // This case is caused by two reasons:
       // 1. The given key event is a control-key event, (e.g. return, page up,
       //    page down, tab, arrows, etc.) or;
       // 2. The given key event is not a control-key event but printable
       //    characters aren't assigned to the event, (e.g. alt+d, etc.)
       // Create a Char event manually from this key event and send it to the
-      // renderer only when this event is a control-key event because
-      // control-key events should be processed by WebKit.
+      // renderer when this Char event contains a printable character which
+      // should be processed by WebKit.
       // TODO(hbono): Windows Chrome sends a Char event with its isSystemKey
       // value true for the above case 2. We should emulate this behavior?
       if (event->type == GDK_KEY_PRESS &&
           !gdk_keyval_to_unicode(event->keyval)) {
         NativeWebKeyboardEvent wke(event);
         wke.type = WebKit::WebInputEvent::Char;
-        host_view->GetRenderWidgetHost()->ForwardKeyboardEvent(wke);
+        if (wke.text[0])
+          host_view->GetRenderWidgetHost()->ForwardKeyboardEvent(wke);
       }
     }
 
     // We return TRUE because we did handle the event. If it turns out webkit
     // can't handle the event, we'll deal with it in
     // RenderView::UnhandledKeyboardEvent().
     return TRUE;
   }
 
   static gboolean OnFocusIn(GtkWidget* widget, GdkEventFocus* focus,
@@ skipping 548 matching lines @@
 }
 
 gfx::PluginWindowHandle RenderWidgetHostViewGtk::CreatePluginContainer() {
   return plugin_container_manager_.CreatePluginContainer();
 }
 
 void RenderWidgetHostViewGtk::DestroyPluginContainer(
     gfx::PluginWindowHandle container) {
   plugin_container_manager_.DestroyPluginContainer(container);
 }