Turn on the save-layer optimization.

src/core/SkRecordOpts.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 "SkRecordOpts.h"
 
 #include "SkRecordPattern.h"
 #include "SkRecords.h"
 #include "SkTDArray.h"
 
 using namespace SkRecords;
 
 void SkRecordOptimize(SkRecord* record) {
-    // TODO(mtklein): rebaseline and re-enable
-    //SkRecordNoopSaveLayerDrawRestores(record);
+    SkRecordNoopSaveLayerDrawRestores(record);
     SkRecordNoopSaveRestores(record);
     SkRecordReduceDrawPosTextStrength(record);
 }
 
 // Most of the optimizations in this file are pattern-based.  These are all defined as structs with:
 //   - a Pattern typedef
 //   - a bool onMatch(SkRceord*, Pattern*, unsigned begin, unsigned end) method,
 //     which returns true if it made changes and false if not.
 
 // Run a pattern-based optimization once across the SkRecord, returning true if it made any changes.
@@ skipping 154 matching lines @@
                              DrawPosTextH,
                              (draw->paint, draw->text, draw->byteLength, scalars, firstY));
         return true;
     }
 };
 void SkRecordReduceDrawPosTextStrength(SkRecord* record) {
     StrengthReducer pass;
     apply(&pass, record);
 }