Fix trailing whitespace in .cpp, .h, and .idl files

Source/core/platform/chromium/KeyCodeConversion.h

Index: Source/core/platform/chromium/KeyCodeConversion.h
diff --git a/Source/core/platform/chromium/KeyCodeConversion.h b/Source/core/platform/chromium/KeyCodeConversion.h
index 8bd0b46b71ba64b82603c3cd6ea6d88f9abb1c3b..0257f5b93a2cea5a6381dc123e1cd98193cda583 100644
--- a/Source/core/platform/chromium/KeyCodeConversion.h
+++ b/Source/core/platform/chromium/KeyCodeConversion.h
@@ -1,10 +1,10 @@
 /*
  * Copyright (c) 2008, 2009, 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
@@ -14,7 +14,7 @@
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR