Fix occurrences of "-Wextra-semi-stmt"

Docs-Preview: https://skia.org/?cl=173761
Change-Id: Iefdb91cd28eabb4b01b7b42a4f300b0b4caf05d9
Reviewed-on: https://skia-review.googlesource.com/c/173761
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
diff --git a/src/shaders/gradients/SkGradientShader.cpp b/src/shaders/gradients/SkGradientShader.cpp
index 2a9bfdd..c1d5f0c 100644
--- a/src/shaders/gradients/SkGradientShader.cpp
+++ b/src/shaders/gradients/SkGradientShader.cpp
@@ -897,8 +897,8 @@
 }
 
 void SkGradientShader::RegisterFlattenables() {
-    SK_REGISTER_FLATTENABLE(SkLinearGradient)
-    SK_REGISTER_FLATTENABLE(SkRadialGradient)
-    SK_REGISTER_FLATTENABLE(SkSweepGradient)
-    SK_REGISTER_FLATTENABLE(SkTwoPointConicalGradient)
+    SK_REGISTER_FLATTENABLE(SkLinearGradient);
+    SK_REGISTER_FLATTENABLE(SkRadialGradient);
+    SK_REGISTER_FLATTENABLE(SkSweepGradient);
+    SK_REGISTER_FLATTENABLE(SkTwoPointConicalGradient);
 }