Add flag to gradients to interpolate colors in premul space. Experimental API to encapsulate the shared parameters for all gradients into a struct.

BUG=
R=bsalomon@google.com

Review URL: https://codereview.chromium.org/15893002

git-svn-id: http://skia.googlecode.com/svn/trunk@9273 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/effects/gradients/SkSweepGradient.cpp b/src/effects/gradients/SkSweepGradient.cpp
index 51433af..f975a18 100644
--- a/src/effects/gradients/SkSweepGradient.cpp
+++ b/src/effects/gradients/SkSweepGradient.cpp
@@ -10,8 +10,8 @@
 
 SkSweepGradient::SkSweepGradient(SkScalar cx, SkScalar cy,
                                  const Descriptor& desc)
-: SkGradientShaderBase(desc),
-  fCenter(SkPoint::Make(cx, cy))
+    : SkGradientShaderBase(desc)
+    , fCenter(SkPoint::Make(cx, cy))
 {
     fPtsToUnit.setTranslate(-cx, -cy);