Move GrInvariantOutput out of GrProcessor and into its own class.

src/gpu/GrAARectRenderer.cpp

Index: src/gpu/GrAARectRenderer.cpp
diff --git a/src/gpu/GrAARectRenderer.cpp b/src/gpu/GrAARectRenderer.cpp
index 6843acad7ae642113c55b9dcf6b833c8ece38895..b1f7cdccf8fc9c98f5fbd9c93b799ac3baeed62c 100644
--- a/src/gpu/GrAARectRenderer.cpp
+++ b/src/gpu/GrAARectRenderer.cpp
@@ -7,6 +7,7 @@
 
 #include "GrAARectRenderer.h"
 #include "GrGpu.h"
+#include "GrInvariantOutput.h"
 #include "gl/builders/GrGLProgramBuilder.h"
 #include "gl/GrGLProcessor.h"
 #include "gl/GrGLGeometryProcessor.h"
@@ -101,7 +102,7 @@ private:
 
     virtual bool onIsEqual(const GrGeometryProcessor&) const SK_OVERRIDE { return true; }
 
-    virtual void onComputeInvariantOutput(InvariantOutput* inout) const SK_OVERRIDE {
+    virtual void onComputeInvariantOutput(GrInvariantOutput* inout) const SK_OVERRIDE {
         inout->mulByUnknownAlpha();
     }
 
@@ -237,7 +238,7 @@ private:
 
     virtual bool onIsEqual(const GrGeometryProcessor&) const SK_OVERRIDE { return true; }
 
-    virtual void onComputeInvariantOutput(InvariantOutput* inout) const SK_OVERRIDE {
+    virtual void onComputeInvariantOutput(GrInvariantOutput* inout) const SK_OVERRIDE {
         inout->mulByUnknownAlpha();
     }