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

Source/core/editing/InsertIntoTextNodeCommand.h

Index: Source/core/editing/InsertIntoTextNodeCommand.h
diff --git a/Source/core/editing/InsertIntoTextNodeCommand.h b/Source/core/editing/InsertIntoTextNodeCommand.h
index 3da364a31552a7f8d0a0f3bdd9f1b04a5d979d0a..d8eea7aad43ecae1d3919de48450d5d1ca8bbd87 100644
--- a/Source/core/editing/InsertIntoTextNodeCommand.h
+++ b/Source/core/editing/InsertIntoTextNodeCommand.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 InsertIntoTextNodeCommand_h
@@ -44,11 +44,11 @@ private:
 
     virtual void doApply() OVERRIDE;
     virtual void doUnapply() OVERRIDE;
-    
+
 #ifndef NDEBUG
     virtual void getNodesInCommand(HashSet<Node*>&) OVERRIDE;
 #endif
-    
+
     RefPtr<Text> m_node;
     unsigned m_offset;
     String m_text;