Add isSingleComponent bool to getConstantColorComponent

src/effects/SkMagnifierImageFilter.cpp

Index: src/effects/SkMagnifierImageFilter.cpp
diff --git a/src/effects/SkMagnifierImageFilter.cpp b/src/effects/SkMagnifierImageFilter.cpp
index 9d7b9183655bc09cbd1c471fe338a1ac06c04e3f..4a3c1b2318684f0831a47233fb13b9ef935ca80b 100644
--- a/src/effects/SkMagnifierImageFilter.cpp
+++ b/src/effects/SkMagnifierImageFilter.cpp
@@ -47,8 +47,6 @@ public:
     static const char* Name() { return "Magnifier"; }
 
     virtual const GrBackendFragmentProcessorFactory& getFactory() const SK_OVERRIDE;
-    virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE;
-
     float x_offset() const { return fXOffset; }
     float y_offset() const { return fYOffset; }
     float x_inv_zoom() const { return fXInvZoom; }
@@ -76,6 +74,8 @@ private:
 
     virtual bool onIsEqual(const GrProcessor&) const SK_OVERRIDE;
 
+    virtual void onComputeInvarientOutput(InvarientOutput* invarientOutput) const SK_OVERRIDE;
+
     GR_DECLARE_FRAGMENT_PROCESSOR_TEST;
 
     float fXOffset;
@@ -227,8 +227,9 @@ bool GrMagnifierEffect::onIsEqual(const GrProcessor& sBase) const {
             this->fYInvInset == s.fYInvInset);
 }
 
-void GrMagnifierEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const {
-    this->updateConstantColorComponentsForModulation(color, validFlags);
+void GrMagnifierEffect::onComputeInvarientOutput(InvarientOutput* invarientOutput) const {
+    this->updateInvarientOutputForModulation(invarientOutput);
+    invarientOutput->isSingleComponent = false;
 }
 
 #endif