Revert of Add isSingleComponent bool to getConstantColorComponent (patchset #6 id:100001 of https://codereview.chromium.org/608253002/)

Reason for revert:
Changing some GMs

Original issue's description:
> Add isSingleComponent bool to getConstantColorComponent
>
> Initial step to allowing effects to use/output 1 or 4 color/coverage components. This cl doesn't change any current logic and all effects still assume they are working with 4 components.
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/3b8af078281a5a20f951b9fd84f38d92b8f6217b

TBR=joshualitt@chromium.org,bsalomon@google.com,reed@google.com,egdaniel@google.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/617853003

1 files changed, 5 insertions, 5 deletions

diff --git a/src/core/SkXfermode.cpp b/src/core/SkXfermode.cpp
index 1d151e4dba..8a3218fcbd 100644
--- a/src/core/SkXfermode.cpp
+++ b/src/core/SkXfermode.cpp
@@ -799,6 +799,11 @@ public:
         }
     }
 
+    virtual void getConstantColorComponents(GrColor* color,
+                                            uint32_t* validFlags) const SK_OVERRIDE {
+        *validFlags = 0;
+    }
+
     virtual const GrBackendFragmentProcessorFactory& getFactory() const SK_OVERRIDE {
         return GrTBackendFragmentProcessorFactory<XferEffect>::getInstance();
     }
@@ -1211,11 +1216,6 @@ private:
         return fMode == s.fMode &&
                fBackgroundAccess.getTexture() == s.fBackgroundAccess.getTexture();
     }
-    
-    virtual void onComputeInvariantOutput(InvariantOutput* inout) const SK_OVERRIDE {
-        inout->fValidFlags = 0;
-        inout->fIsSingleComponent = false;
-    }
 
     SkXfermode::Mode fMode;
     GrCoordTransform fBackgroundTransform;