Add support for transformedLocalCoords to GrDefaultGeoProc

src/gpu/gl/GrGLGeometryProcessor.h

Index: src/gpu/gl/GrGLGeometryProcessor.h
diff --git a/src/gpu/gl/GrGLGeometryProcessor.h b/src/gpu/gl/GrGLGeometryProcessor.h
index 747d82ab4859f0b76f244562d4ae1a39671eb5d4..f78c1d62c1c39f7e0d5425d4248f717f10f18abe 100644
--- a/src/gpu/gl/GrGLGeometryProcessor.h
+++ b/src/gpu/gl/GrGLGeometryProcessor.h
@@ -50,6 +50,7 @@ protected:
         this->emitTransforms(gp, posVar, localCoords, SkMatrix::I(), tin, tout);
     }
 
+    // emit transforms via uniform

[bsalomon, 2015/08/05 15:17:02]

// Emit a uniform matrix for each coord transform.
?

     void emitTransforms(GrGLGPBuilder*,
                         const GrShaderVar& posVar,
                         const char* localCoords,
@@ -57,6 +58,12 @@ protected:
                         const TransformsIn&,
                         TransformsOut*);
 
+    // caller has emitted transforms via attributes

[bsalomon, 2015/08/05 15:17:02]

// Emit pre-transformed coords as a vertex attribute per coord-transform.
?

+    void emitTransforms(GrGLGPBuilder*,
+                        const char* localCoords,
+                        const TransformsIn& tin,
+                        TransformsOut* tout);
+
     struct GrGPArgs {
         // The variable used by a GP to store its position. It can be
         // either a vec2 or a vec3 depending on the presence of perspective.