Move common logic between BoxReflectFilterOperation and FEBoxReflect into BoxReflection.

third_party/WebKit/Source/platform/graphics/filters/FEBoxReflect.cpp

Index: third_party/WebKit/Source/platform/graphics/filters/FEBoxReflect.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/filters/FEBoxReflect.cpp b/third_party/WebKit/Source/platform/graphics/filters/FEBoxReflect.cpp
index bd73ca8750cef603ad66aeb7ed6aee7508d4341b..456932579b7067c07b64c7e5cb0b6e50e73583c9 100644
--- a/third_party/WebKit/Source/platform/graphics/filters/FEBoxReflect.cpp
+++ b/third_party/WebKit/Source/platform/graphics/filters/FEBoxReflect.cpp
@@ -10,15 +10,9 @@
 
 namespace blink {
 
-FEBoxReflect* FEBoxReflect::create(Filter* filter, ReflectionDirection direction, float offset)
-{
-    return new FEBoxReflect(filter, direction, offset);
-}
-
-FEBoxReflect::FEBoxReflect(Filter* filter, ReflectionDirection direction, float offset)
+FEBoxReflect::FEBoxReflect(Filter* filter, const BoxReflection& reflection)
     : FilterEffect(filter)
-    , m_reflectionDirection(direction)
-    , m_offset(offset)
+    , m_reflection(reflection)
 {
 }
 
@@ -28,17 +22,9 @@ FEBoxReflect::~FEBoxReflect()
 
 FloatRect FEBoxReflect::mapRect(const FloatRect& rect, bool forward) const
 {
-    // Reflection about any line is self-inverse, so this matrix works for both
-    // forward and reverse mapping.
-    SkMatrix flipMatrix = SkiaImageFilterBuilder().matrixForBoxReflectFilter(
-        m_reflectionDirection, m_offset);
-
-    SkRect reflection(rect);
-    flipMatrix.mapRect(&reflection);
-
-    FloatRect result = rect;
-    result.unite(reflection);
-    return result;
+    // Reflection about any line is self-inverse, so this for both forward and
+    // reverse mapping.
+    return m_reflection.mapRect(rect);
 }
 
 TextStream& FEBoxReflect::externalRepresentation(TextStream& ts, int indent) const
@@ -51,7 +37,7 @@ TextStream& FEBoxReflect::externalRepresentation(TextStream& ts, int indent) con
 PassRefPtr<SkImageFilter> FEBoxReflect::createImageFilter(SkiaImageFilterBuilder& builder)
 {
     RefPtr<SkImageFilter> input(builder.build(inputEffect(0), operatingColorSpace()));
-    return builder.buildBoxReflectFilter(m_reflectionDirection, m_offset, nullptr, input.get());
+    return SkiaImageFilterBuilder().buildBoxReflectFilter(m_reflection, input.release());
 }
 
 } // namespace blink