Simplify path allocation, clean up resources correctly

src/gpu/gl/GrGLGpu.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 "GrGLGpu.h"
 #include "GrGLGLSL.h"
@@ skipping 209 matching lines @@
 
     if (this->glCaps().shaderCaps()->pathRenderingSupport()) {
         fPathRendering.reset(new GrGLPathRendering(this));
     }
     this->createCopyPrograms();
     fWireRectProgram.fProgram = 0;
     fWireRectArrayBuffer = 0;
 }
 
 GrGLGpu::~GrGLGpu() {
+    // Delete the path rendering explicitly, since it will need working gpu object to release the
+    // resources the object itself holds.
+    fPathRendering.reset();
+
     if (0 != fHWProgramID) {
         // detach the current program so there is no confusion on OpenGL's part
         // that we want it to be deleted
         GL_CALL(UseProgram(0));
     }
 
     if (0 != fTempSrcFBOID) {
         GL_CALL(DeleteFramebuffers(1, &fTempSrcFBOID));
     }
     if (0 != fTempDstFBOID) {
@@ skipping 3247 matching lines @@
             this->setVertexArrayID(gpu, 0);
         }
         int attrCount = gpu->glCaps().maxVertexAttributes();
         if (fDefaultVertexArrayAttribState.count() != attrCount) {
             fDefaultVertexArrayAttribState.resize(attrCount);
         }
         attribState = &fDefaultVertexArrayAttribState;
     }
     return attribState;
 }