Refactor DrawTarget and GPU to be independent

src/gpu/gl/GrGpuGL.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "GrGpuGL.h"
 #include "GrGLStencilBuffer.h"
@@ skipping 1713 matching lines @@
                 GetWindowThreadProcessId(hwnd, &wndProcID);
                 if(wndProcID == procID) {
                     SwapBuffers(GetDC(hwnd));
                 }
                 hwnd = GetNextWindow(hwnd, GW_HWNDNEXT);
             }
          }
     #endif
 #endif
 
-void GrGpuGL::onGpuDraw(const DrawInfo& info) {
+void GrGpuGL::onGpuDraw(const GrDrawTarget::DrawInfo& info) {
     size_t indexOffsetInBytes;
     this->setupGeometry(info, &indexOffsetInBytes);
 
     SkASSERT((size_t)info.primitiveType() < SK_ARRAY_COUNT(gPrimitiveType2GLMode));
 
     if (info.isIndexed()) {
         GrGLvoid* indices =
             reinterpret_cast<GrGLvoid*>(indexOffsetInBytes + sizeof(uint16_t) * info.startIndex());
         // info.startVertex() was accounted for by setupGeometry.
         GL_CALL(DrawElements(gPrimitiveType2GLMode[info.primitiveType()],
@@ skipping 811 matching lines @@
             this->setVertexArrayID(gpu, 0);
         }
         int attrCount = gpu->glCaps().maxVertexAttributes();
         if (fDefaultVertexArrayAttribState.count() != attrCount) {
             fDefaultVertexArrayAttribState.resize(attrCount);
         }
         attribState = &fDefaultVertexArrayAttribState;
     }
     return attribState;
 }