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

Source/core/editing/CompositeEditCommand.h

Index: Source/core/editing/CompositeEditCommand.h
diff --git a/Source/core/editing/CompositeEditCommand.h b/Source/core/editing/CompositeEditCommand.h
index 35fe4fb5068bb9fa41d2317fa9267761fc224ce4..d791e535baf78aefe3edb68125b44adadfd0c478 100644
--- a/Source/core/editing/CompositeEditCommand.h
+++ b/Source/core/editing/CompositeEditCommand.h
@@ -20,7 +20,7 @@
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef CompositeEditCommand_h
@@ -150,7 +150,7 @@ protected:
     PassRefPtr<Node> insertNewDefaultParagraphElementAt(const Position&);
 
     PassRefPtr<Node> moveParagraphContentsToNewBlockIfNecessary(const Position&);
-    
+
     void pushAnchorElementDown(Node*);
 
     // FIXME: preserveSelection and preserveStyle should be enums
@@ -159,12 +159,12 @@ protected:
     void moveParagraphWithClones(const VisiblePosition& startOfParagraphToMove, const VisiblePosition& endOfParagraphToMove, Element* blockElement, Node* outerNode);
     void cloneParagraphUnderNewElement(Position& start, Position& end, Node* outerNode, Element* blockElement);
     void cleanupAfterDeletion(VisiblePosition destination = VisiblePosition());
-    
+
     bool breakOutOfEmptyListItem();
     bool breakOutOfEmptyMailBlockquotedParagraph();
-    
+
     Position positionAvoidingSpecialElementBoundary(const Position&);
-    
+
     PassRefPtr<Node> splitTreeToNode(Node*, Node*, bool splitAncestor = false);
 
     Vector<RefPtr<EditCommand> > m_commands;
@@ -174,7 +174,7 @@ private:
 
     RefPtr<EditCommandComposition> m_composition;
 };
-    
+
 void applyCommand(PassRefPtr<CompositeEditCommand>);
 
 inline CompositeEditCommand* toCompositeEditCommand(EditCommand* command)