Make Sk4f(float) constructor explicit.
BUG=skia:
Review URL: https://codereview.chromium.org/985003003
diff --git a/tests/PMFloatTest.cpp b/tests/PMFloatTest.cpp
index 13c0a12..f370b39 100644
--- a/tests/PMFloatTest.cpp
+++ b/tests/PMFloatTest.cpp
@@ -24,7 +24,7 @@
// Test SkPMFloat <-> Sk4f conversion.
Sk4f fs = clamped;
- SkPMFloat scaled = fs.multiply(0.25f);
+ SkPMFloat scaled = fs.multiply(Sk4f(0.25f));
REPORTER_ASSERT(r, SkScalarNearlyEqual(63.75f, scaled.a()));
REPORTER_ASSERT(r, SkScalarNearlyEqual(38.25f, scaled.r()));
REPORTER_ASSERT(r, SkScalarNearlyEqual( 0.25f, scaled.g()));