Use std::unique_ptr.

src/gpu/text/GrStencilAndCoverTextContext.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 "GrStencilAndCoverTextContext.h"
 #include "GrAtlasTextContext.h"
 #include "GrDrawContext.h"
@@ skipping 311 matching lines @@
         fCpuMemorySize += run->computeSizeInCache();
     }
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 class GrStencilAndCoverTextContext::FallbackBlobBuilder {
 public:
     FallbackBlobBuilder() : fBuffIdx(0), fCount(0) {}
 
-    bool isInitialized() const { return SkToBool(fBuilder); }
+    bool isInitialized() const { return fBuilder != nullptr; }
 
     void init(const SkPaint& font, SkScalar textRatio);
 
     void appendGlyph(uint16_t glyphId, const SkPoint& pos);
 
     const SkTextBlob* buildIfNeeded(int* count);
 
 private:
     enum { kWriteBufferSize = 1024 };
 
@@ skipping 361 matching lines @@
 }
 
 const SkTextBlob* GrStencilAndCoverTextContext::FallbackBlobBuilder::buildIfNeeded(int *count) {
     *count = fCount;
     if (fCount) {
         this->flush();
         return fBuilder->build();
     }
     return nullptr;
 }