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

Source/core/html/canvas/Int32Array.idl

Index: Source/core/html/canvas/Int32Array.idl
diff --git a/Source/core/html/canvas/Int32Array.idl b/Source/core/html/canvas/Int32Array.idl
index 012e6a8b8b7d84585babe24a0efa58707599e8db..7b2852690ad9a946b242a8346c5cb6a00a138a0b 100644
--- a/Source/core/html/canvas/Int32Array.idl
+++ b/Source/core/html/canvas/Int32Array.idl
@@ -21,7 +21,7 @@
  * 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.
  */
 
 [
@@ -33,7 +33,7 @@
     const unsigned long BYTES_PER_ELEMENT = 4;
 
     readonly attribute unsigned long length;
-    Int32Array subarray([Default=Undefined] optional long start, 
+    Int32Array subarray([Default=Undefined] optional long start,
                         optional long end);
 
     // void set(Int32Array array, optional in unsigned long offset);