Fix multipicturedraw_biglayer GM

gm/multipicturedraw.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gm.h"
 
 #include "SkColorFilter.h"
@@ skipping 88 matching lines @@
 
     SkPaint stroke;
     stroke.setStyle(SkPaint::kStroke_Style);
     stroke.setStrokeWidth(3);
 
     SkPictureRecorder recorder;
 
     static const SkScalar kBig = 10000.0f;
     SkCanvas* canvas = recorder.beginRecording(kBig, kBig);
 
+    canvas->saveLayer(NULL, NULL);
+
     SkScalar xPos = 0.0f, yPos = 0.0f;
 
     for (int y = 0; yPos < kBig; ++y) {
         xPos = 0;
 
         for (int x = 0; xPos < kBig; ++x) {
             canvas->save();
             canvas->translate(xPos, yPos + ((x % 2) ? kRoot3Over2 * kHexSide : 0));
             // The color of the filled hex is swapped to yield a different
             // pattern in each tile. This allows an error in layer hoisting (e.g.,
             // the clip isn't blocking cache reuse) to cause a visual discrepancy.
             canvas->drawPath(hex, ((x+y) % 3) ? whiteFill : greyFill);
             canvas->drawPath(hex, stroke);
             canvas->restore();
 
             xPos += 1.5f * kHexSide;
         }
 
         yPos += 2 * kHexSide * kRoot3Over2;
     }
 
+    canvas->restore();
+
     return recorder.endRecording();
 }
 
 // Make an equilateral triangle path with its top corner at (originX, originY)
 static SkPath make_tri_path(SkScalar originX, SkScalar originY) {
     SkPath tri;
     tri.moveTo(originX, originY);
     tri.rLineTo(SkScalarHalf(kTriSide), 1.5f * kTriSide / kRoot3);
     tri.rLineTo(-kTriSide, 0);
     tri.close();
@@ skipping 402 matching lines @@
                                                 MultiPictureDraw::kTiled_Layout));)
     DEF_GM(return SkNEW_ARGS(MultiPictureDraw, (MultiPictureDraw::kPathClipMulti_Content,
                                                 MultiPictureDraw::kTiled_Layout));)
     DEF_GM(return SkNEW_ARGS(MultiPictureDraw, (MultiPictureDraw::kInvPathClipMulti_Content,
                                                 MultiPictureDraw::kTiled_Layout));)
     DEF_GM(return SkNEW_ARGS(MultiPictureDraw, (MultiPictureDraw::kSierpinski_Content,
                                                 MultiPictureDraw::kTiled_Layout));)
     DEF_GM(return SkNEW_ARGS(MultiPictureDraw, (MultiPictureDraw::kBigLayer_Content,
                                                 MultiPictureDraw::kTiled_Layout));)
 }