Convert //components/dom_distiller from scoped_ptr to std::unique_ptr

components/dom_distiller/content/browser/dom_distiller_viewer_source_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/dom_distiller/content/browser/dom_distiller_viewer_source.h"
 
 #include "components/dom_distiller/core/url_constants.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace dom_distiller {
 
 const char kTestScheme[] = "myscheme";
 
 class DomDistillerViewerSourceTest : public testing::Test {
  public:
   void SetUp() override {
     source_.reset(new DomDistillerViewerSource(nullptr, kTestScheme, nullptr));
   }
 
  protected:
-  scoped_ptr<DomDistillerViewerSource> source_;
+  std::unique_ptr<DomDistillerViewerSource> source_;
 };
 
 TEST_F(DomDistillerViewerSourceTest, TestMimeType) {
   EXPECT_EQ("text/css", source_.get()->GetMimeType(kViewerCssPath));
   EXPECT_EQ("text/html", source_.get()->GetMimeType("anythingelse"));
 
 }
 
 }  // namespace dom_distiller