Remove implicit conversions from scoped_refptr to T* in c/b/chromeos/login

chrome/browser/chromeos/login/screenshot_tester.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 "chrome/browser/chromeos/login/screenshot_tester.h"
 
 #include "ash/shell.h"
 #include "base/base_export.h"
 #include "base/bind_internal.h"
 #include "base/command_line.h"
@@ skipping 87 matching lines @@
 void ScreenshotTester::UpdateGoldenScreenshot(PNGFile png_data) {
   CHECK(SaveImage("golden_screenshot", golden_screenshots_dir_, png_data));
 }
 
 bool ScreenshotTester::SaveImage(const std::string& file_name,
                                  const base::FilePath& screenshot_dir,
                                  PNGFile png_data) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   base::FilePath screenshot_path =
       screenshot_dir.AppendASCII(test_name_ + "_" + file_name + ".png");
-  if (!png_data) {
+  if (!png_data.get()) {
     LOG(ERROR) << "Can't take a screenshot";
     return false;
   }
   if (!base::CreateDirectory(screenshot_path.DirName())) {
     LOG(ERROR) << "Can't create a directory "
                << screenshot_path.DirName().value();
     return false;
   }
   if (static_cast<size_t>(
           base::WriteFile(screenshot_path,
@@ skipping 96 matching lines @@
     VLOG(0) << "Current screenshot and diff picture saved to "
             << artifacts_dir_.value();
   } else {
     VLOG(0) << "Current screenshot matches the golden screenshot. Screenshot "
                "testing passed.";
   }
   ASSERT_TRUE(screenshots_match);
 }
 
 }  // namespace chromeos