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

Source/core/platform/graphics/Color.h

Index: Source/core/platform/graphics/Color.h
diff --git a/Source/core/platform/graphics/Color.h b/Source/core/platform/graphics/Color.h
index 1734fb19caaa92d4b944f30bbe412a710a5d9344..4416bdedf26ff8765526171b85bb4b3774e86eb8 100644
--- a/Source/core/platform/graphics/Color.h
+++ b/Source/core/platform/graphics/Color.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 Color_h
@@ -89,7 +89,7 @@ public:
     int green() const { return greenChannel(m_color); }
     int blue() const { return blueChannel(m_color); }
     int alpha() const { return alphaChannel(m_color); }
-    
+
     RGBA32 rgb() const { return m_color; } // Preserve the alpha.
     void setRGB(int r, int g, int b) { m_color = makeRGB(r, g, b); }
     void setRGB(RGBA32 rgb) { m_color = rgb; }