remove proc key

BUG=skia:

Review URL: https://codereview.chromium.org/755363002
diff --git a/src/effects/gradients/SkGradientShader.cpp b/src/effects/gradients/SkGradientShader.cpp
index 48d0238..a84c6fd 100644
--- a/src/effects/gradients/SkGradientShader.cpp
+++ b/src/effects/gradients/SkGradientShader.cpp
@@ -1046,7 +1046,7 @@
 
     if (SkGradientShaderBase::kTwo_GpuColorType == e.getColorType()) {
         key |= kTwoColorKey;
-    } else if (SkGradientShaderBase::kThree_GpuColorType == e.getColorType()){
+    } else if (SkGradientShaderBase::kThree_GpuColorType == e.getColorType()) {
         key |= kThreeColorKey;
     }