Fix Ganesh perspective projection bug

src/gpu/gl/GrGLProgram.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef GrGLProgram_DEFINED
 #define GrGLProgram_DEFINED
@@ skipping 54 matching lines @@
             fRenderTargetSize.fWidth = -1;
             fRenderTargetSize.fHeight = -1;
             fRenderTargetOrigin = (GrSurfaceOrigin) -1;
         }
 
         /**
          * Gets a vec4 that adjusts the position from Skia device coords to GL's normalized device
          * coords. Assuming the transformed position, pos, is a homogeneous vec3, the vec, v, is
          * applied as such:
          * pos.x = dot(v.xy, pos.xz)
-         * pos.y = dot(v.zq, pos.yz)
+         * pos.y = dot(v.zw, pos.yz)
          */
         void getRTAdjustmentVec(GrGLfloat* destVec) {
             destVec[0] = 2.f / fRenderTargetSize.fWidth;
             destVec[1] = -1.f;
             if (kBottomLeft_GrSurfaceOrigin == fRenderTargetOrigin) {
                 destVec[2] = -2.f / fRenderTargetSize.fHeight;
                 destVec[3] = 1.f;
             } else {
                 destVec[2] = 2.f / fRenderTargetSize.fHeight;
                 destVec[3] = -1.f;
@@ skipping 54 matching lines @@
     GrGLGpu* fGpu;
     GrGLProgramDataManager fProgramDataManager;
     SkTArray<UniformHandle> fSamplerUniforms;
 
     friend class GrGLProgramBuilder;
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif