Remove viewmatrix from GrGeometryProcessor base class

src/gpu/gl/GrGLGeometryProcessor.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLGeometryProcessor_DEFINED
 #define GrGLGeometryProcessor_DEFINED
 
@@ skipping 35 matching lines @@
 
     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.
         GrShaderVar fPositionVar;
     };
 
     // Create the correct type of position variable given the CTM
     void setupPosition(GrGLGPBuilder* pb,
                        GrGPArgs* gpArgs,
                        const char* posName,

[robertphillips, 2015/05/14 16:20:10]

Hmmm

-                       const SkMatrix& mat);
+                       const SkMatrix& mat = SkMatrix::I());
 
     static uint32_t ComputePosKey(const SkMatrix& mat) {
         if (mat.isIdentity()) {
             return 0x0;
         } else if (!mat.hasPerspective()) {
             return 0x01;
         } else {
             return 0x02;
         }
     }
 
 private:
     virtual void onEmitCode(EmitArgs&, GrGPArgs*) = 0;
 
     typedef GrGLPrimitiveProcessor INHERITED;
 };
 
 #endif