Windows: Add an "Open in Adobe Reader" menu item for PDF files in the download shelf.

chrome/browser/ui/pdf/adobe_reader_info_win.h

+// 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.
+
+#ifndef CHROME_BROWSER_UI_PDF_ADOBE_READER_INFO_WIN_H_
+#define CHROME_BROWSER_UI_PDF_ADOBE_READER_INFO_WIN_H_
+
+#include "base/basictypes.h"
+#include "base/callback_forward.h"
+#include "content/public/common/webplugininfo.h"
+
+namespace content {
+class WebContents;
+}
+
+#if defined(ENABLE_PLUGIN_INSTALLATION)
+struct AdobeReaderPluginInfo {
+  bool is_installed;
+  bool is_enabled;    // Only valid in the context of a given WebContents.
+  bool is_secure;     // Whether the plugin is up to date.
+  content::WebPluginInfo plugin_info;
+};
+
+typedef base::Callback<void(const AdobeReaderPluginInfo&)>
+    GetAdobeReaderPluginInfoCallback;
+
+// Fetches information about the Adobe Reader plugin asynchronously.
+// If |web_contents| is NULL, then the plugin's enable status cannot be
+// determined.
+void GetAdobeReaderPluginInfoAsync(
+    content::WebContents* web_contents,
+    const GetAdobeReaderPluginInfoCallback& callback);
+
+// Fetches information about the Adobe Reader plugin synchronously.
+// Returns true if the plugin info is not stale.
+// If |web_contents| is NULL, then the plugin's enable status cannot be
+// determined.
+bool GetAdobeReaderPluginInfo(content::WebContents* web_contents,

[jam, 2014/06/09 19:49:09]

nit: above and here, i think it would be clearer if this took a Profile* or
BrowserContext* instead of a WebContents. That way it's clear that the enabled
flag comes from the profile, and isn't a per-tab thing

[Lei Zhang, 2014/06/12 05:04:26]

Done.

+                              AdobeReaderPluginInfo* reader_info);
+#endif
+
+// Returns whether Adobe Reader is the default PDF viewer.
+bool IsAdobeReaderDefaultPDFViewer();
+
+#endif  // CHROME_BROWSER_UI_PDF_ADOBE_READER_INFO_WIN_H_