media: Check Widevine CDM registration and availability.

chrome/browser/media/pepper_cdm_test_helper.h

 // Copyright 2016 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_MEDIA_PEPPER_CDM_TEST_HELPER_H_
 #define CHROME_BROWSER_MEDIA_PEPPER_CDM_TEST_HELPER_H_
 
 #include <string>
 
 #include "base/files/file_path.h"
 
 namespace base {
 class CommandLine;
 }
 
 // Base path for Clear Key CDM (relative to the chrome executable).
 extern const char kClearKeyCdmBaseDirectory[];
 
 // Platform-specific filename relative to kClearKeyCdmBaseDirectory.
 extern const char kClearKeyCdmAdapterFileName[];
 
 // Display name for Clear Key CDM.
 extern const char kClearKeyCdmDisplayName[];
 
 // Pepper type for Clear Key CDM.
 extern const char kClearKeyCdmPepperMimeType[];
 
+// Returns the path a pepper CDM adapter.
+base::FilePath GetPepperCdmPath(const std::string& adapter_base_dir,
+                                const std::string& adapter_file_name);
+
 // Builds the string to pass to kRegisterPepperPlugins for a single
 // CDM using the provided parameters and a dummy version.
 // Multiple results may be passed to kRegisterPepperPlugins, separated by ",".
 // The CDM adapter should be located in DIR_MODULE.
 base::FilePath::StringType BuildPepperCdmRegistration(
     const std::string& adapter_base_dir,
     const std::string& adapter_file_name,
     const std::string& display_name,
     const std::string& mime_type,
     bool expect_adapter_exists = true);
 
 // Registers pepper CDM in |command_line|.
 void RegisterPepperCdm(base::CommandLine* command_line,
                        const std::string& adapter_base_dir,
                        const std::string& adapter_file_name,
                        const std::string& display_name,
                        const std::string& mime_type,
                        bool expect_adapter_exists = true);
 
+// Returns whether a pepper CDM with |mime_type| is registered.
+bool IsPepperCdmRegistered(const std::string& mime_type);
+
 #endif  // CHROME_BROWSER_MEDIA_PEPPER_CDM_TEST_HELPER_H_