Revert of free -> reset

src/pdf/SkPDFDevice.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 "SkPDFDevice.h"
 
 #include "SkAnnotationKeys.h"
@@ skipping 714 matching lines @@
     } else {
         fInitialTransform.setIdentity();
     }
 }
 
 SkPDFDevice::~SkPDFDevice() {
     this->cleanUp(true);
 }
 
 void SkPDFDevice::init() {
-    fContentEntries.reset();
+    fContentEntries.free();
     fLastContentEntry = nullptr;
-    fMarginContentEntries.reset();
+    fMarginContentEntries.free();
     fLastMarginContentEntry = nullptr;
     fDrawingArea = kContent_DrawingArea;
     if (fFontGlyphUsage.get() == nullptr) {
         fFontGlyphUsage.reset(new SkPDFGlyphSetMap);
     }
 }
 
 void SkPDFDevice::cleanUp(bool clearFontUsage) {
     fGraphicStateResources.unrefAll();
     fXObjectResources.unrefAll();
@@ skipping 1581 matching lines @@
         pdfimage.reset(SkPDFCreateBitmapObject(
                                image, fCanon->getPixelSerializer()));
         if (!pdfimage) {
             return;
         }
         fCanon->addPDFBitmap(image->uniqueID(), pdfimage.get());
     }
     SkPDFUtils::DrawFormXObject(this->addXObjectResource(pdfimage.get()),
                                 &content.entry()->fContent);
 }