|  | // Copyright 2017 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. | 
|  |  | 
|  | #ifndef CHROME_COMMON_PDF_UTIL_H_ | 
|  | #define CHROME_COMMON_PDF_UTIL_H_ | 
|  |  | 
|  | #include <string> | 
|  |  | 
|  | class GURL; | 
|  |  | 
|  | // Must be kept in sync with PDFLoadStatus enum in histograms.xml. | 
|  | // This enum should be treated as append-only. | 
|  | enum class PDFLoadStatus { | 
|  | kLoadedFullPagePdfWithPdfium = 0, | 
|  | kLoadedEmbeddedPdfWithPdfium = 1, | 
|  | kShowedDisabledPluginPlaceholderForEmbeddedPdf = 2, | 
|  | kTriggeredNoGestureDriveByDownload = 3, | 
|  | kLoadedIframePdfWithNoPdfViewer = 4, | 
|  | kViewPdfClickedInPdfPluginPlaceholder = 5, | 
|  | kPdfLoadStatusCount | 
|  | }; | 
|  |  | 
|  | void ReportPDFLoadStatus(PDFLoadStatus status); | 
|  |  | 
|  | // Returns the HTML contents of the placeholder. | 
|  | std::string GetPDFPlaceholderHTML(const GURL& pdf_url); | 
|  |  | 
|  | constexpr char kPDFMimeType[] = "application/pdf"; | 
|  |  | 
|  | #endif  // CHROME_COMMON_PDF_UTIL_H_ |