Fix trailing whitespace in .cpp, .h, and .idl files (ex. Source/core)

Source/wtf/VMTags.h

Index: Source/wtf/VMTags.h
diff --git a/Source/wtf/VMTags.h b/Source/wtf/VMTags.h
index dbb8751ad2a7605a24f7629f1961db5f6b3798e7..37a4bb7430994148af52edf5d7a78b7deae037cc 100644
--- a/Source/wtf/VMTags.h
+++ b/Source/wtf/VMTags.h
@@ -20,14 +20,14 @@
  * 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 VMTags_h
 #define VMTags_h
 
 // On Mac OS X, the VM subsystem allows tagging memory requested from mmap and vm_map
-// in order to aid tools that inspect system memory use. 
+// in order to aid tools that inspect system memory use.
 #if OS(DARWIN)
 
 #include <mach/vm_statistics.h>