Cleanup GrDefaultGeoProcFactory localCoords

src/gpu/GrDefaultGeoProcFactory.h

Index: src/gpu/GrDefaultGeoProcFactory.h
diff --git a/src/gpu/GrDefaultGeoProcFactory.h b/src/gpu/GrDefaultGeoProcFactory.h
index 86c59c40e1b0d64c7278956f8e7e1e0061c4cbfc..cdea97bde9fe044044d6ed6bff1cceb5af09897f 100644
--- a/src/gpu/GrDefaultGeoProcFactory.h
+++ b/src/gpu/GrDefaultGeoProcFactory.h
@@ -111,17 +111,30 @@ public:
 
     struct LocalCoords {
         enum Type {
-            kNone_Type,
+            kUnused_Type,
             kUsePosition_Type,
             kHasExplicit_Type,
         };
+        LocalCoords(Type type) : fType(type), fMatrix(NULL) {}
+        LocalCoords(Type type, const SkMatrix* matrix) : fType(type), fMatrix(matrix) {
+            SkASSERT(kUnused_Type != type);
+        }
+        bool hasLocalMatrix() const { return NULL != fMatrix; }
+
+        Type fType;
+        const SkMatrix* fMatrix;
     };
 
     static const GrGeometryProcessor* Create(const Color&,
                                              const Coverage&,
-                                             LocalCoords::Type,
-                                             const SkMatrix& viewMatrix = SkMatrix::I(),
-                                             const SkMatrix& localMatrix = SkMatrix::I());
+                                             const LocalCoords&,
+                                             const SkMatrix& viewMatrix = SkMatrix::I());
+
+    // can fail if the viewmatrix is noninvertible

[bsalomon, 2015/07/28 14:39:08]

I think this needs a little bit of explanation. "Use this factory to create a GP
that expects a device space vertex position attribute. The view matrix must
still be provided to compute correctly transformed coordinates for
GrFragmentProcessors. It may fail if the view matrix is not invertible."

+    static const GrGeometryProcessor* CreateForDeviceSpace(const Color&,
+                                                           const Coverage&,
+                                                           const LocalCoords&,
+                                                           const SkMatrix& viewMatrix);
 
     /*
      * The following functions are used to create default GPs. If you just need to create