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

Source/core/editing/DeleteFromTextNodeCommand.cpp

Index: Source/core/editing/DeleteFromTextNodeCommand.cpp
diff --git a/Source/core/editing/DeleteFromTextNodeCommand.cpp b/Source/core/editing/DeleteFromTextNodeCommand.cpp
index dbfcbd4ce225d649c296b8ce5bd14bd89eb45a57..2841a498b32bbe4e8449ec7379aeb7573427834c 100644
--- a/Source/core/editing/DeleteFromTextNodeCommand.cpp
+++ b/Source/core/editing/DeleteFromTextNodeCommand.cpp
@@ -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.
  */
 
 #include "config.h"
@@ -55,7 +55,7 @@ void DeleteFromTextNodeCommand::doApply()
     m_text = m_node->substringData(m_offset, m_count, ec);
     if (ec)
         return;
-    
+
     // Need to notify this before actually deleting the text
     if (AXObjectCache* cache = document()->existingAXObjectCache())
         cache->nodeTextChangeNotification(m_node.get(), AXObjectCache::AXTextDeleted, m_offset, m_text);