Make drawRect preserve vertex attrib state and push/pop the geom sources.

src/gpu/GrAARectRenderer.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrAARectRenderer.h"
 #include "GrRefCnt.h"
 #include "GrGpu.h"
@@ skipping 160 matching lines @@
 
     verts += 4 * vsize;
     for (int i = 0; i < 4; ++i) {
         *reinterpret_cast<GrColor*>(verts + i * vsize) = innerColor;
     }
 
     target->setIndexSourceToBuffer(indexBuffer);
     target->drawIndexedInstances(kTriangles_GrPrimitiveType, 1,
                                  kVertsPerAAFillRect,
                                  kIndicesPerAAFillRect);
+    target->resetIndexSource();
 }
 
 void GrAARectRenderer::strokeAARect(GrGpu* gpu,
                                     GrDrawTarget* target,
                                     const GrRect& devRect,
                                     const GrVec& devStrokeSize,
                                     bool useVertexCoverage) {
     GrDrawState* drawState = target->drawState();
 
     const SkScalar& dx = devStrokeSize.fX;
@@ skipping 73 matching lines @@
     // The innermost rect has full coverage
     verts += 8 * vsize;
     for (int i = 0; i < 4; ++i) {
         *reinterpret_cast<GrColor*>(verts + i * vsize) = 0;
     }
 
     target->setIndexSourceToBuffer(indexBuffer);
     target->drawIndexed(kTriangles_GrPrimitiveType,
                         0, 0, 16, aaStrokeRectIndexCount());
 }