media: Check Widevine CDM registration and availability.

chrome/browser/media/pepper_cdm_test_helper.cc

 // 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.
 
 #include "chrome/browser/media/pepper_cdm_test_helper.h"
 
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/path_service.h"
 #include "base/strings/utf_string_conversions.h"
+#include "content/public/browser/plugin_service.h"
 #include "content/public/common/content_switches.h"
+#include "content/public/common/webplugininfo.h"
 #include "media/cdm/cdm_paths.h"
 
 #include "widevine_cdm_version.h"  //  In SHARED_INTERMEDIATE_DIR.
 
 const char kClearKeyCdmBaseDirectory[] = "ClearKeyCdm";
 
 const char kClearKeyCdmAdapterFileName[] =
 #if defined(OS_MACOSX)
     "clearkeycdmadapter.plugin";
 #elif defined(OS_WIN)
     "clearkeycdmadapter.dll";
 #elif defined(OS_POSIX)
     "libclearkeycdmadapter.so";
 #endif
 
 const char kClearKeyCdmDisplayName[] = "Clear Key CDM";
 
 const char kClearKeyCdmPepperMimeType[] = "application/x-ppapi-clearkey-cdm";
 
+base::FilePath GetPepperCdmPath(const std::string& adapter_base_dir,
+                                const std::string& adapter_file_name) {
+  base::FilePath adapter_path;
+  PathService::Get(base::DIR_MODULE, &adapter_path);
+  adapter_path = adapter_path.Append(
+      media::GetPlatformSpecificDirectory(adapter_base_dir));
+  adapter_path = adapter_path.AppendASCII(adapter_file_name);
+  return adapter_path;
+}
+
 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) {
-  base::FilePath adapter_path;
-  PathService::Get(base::DIR_MODULE, &adapter_path);
-  adapter_path = adapter_path.Append(
-      media::GetPlatformSpecificDirectory(adapter_base_dir));
-  adapter_path = adapter_path.AppendASCII(adapter_file_name);
+  base::FilePath adapter_path =
+      GetPepperCdmPath(adapter_base_dir, adapter_file_name);
   DCHECK_EQ(expect_adapter_exists, base::PathExists(adapter_path))
       << adapter_path.MaybeAsASCII();
 
   base::FilePath::StringType pepper_cdm_registration = adapter_path.value();
 
   std::string string_to_append = "#";
   string_to_append.append(display_name);
   string_to_append.append("#CDM#0.1.0.0;");
   string_to_append.append(mime_type);
 
@@ skipping 14 matching lines @@
                        bool expect_adapter_exists) {
   base::FilePath::StringType pepper_cdm_registration =
       BuildPepperCdmRegistration(adapter_base_dir, adapter_file_name,
                                  display_name, mime_type,
                                  expect_adapter_exists);
 
   // Append the switch to register the CDM Adapter.
   command_line->AppendSwitchNative(switches::kRegisterPepperPlugins,
                                    pepper_cdm_registration);
 }
+
+bool IsPepperCdmRegistered(const std::string& mime_type) {
+  std::vector<content::WebPluginInfo> plugins;
+  content::PluginService::GetInstance()->GetInternalPlugins(&plugins);
+  for (const auto& plugin : plugins) {
+    for (const auto& plugin_mime_type : plugin.mime_types) {
+      if (plugin_mime_type.mime_type == mime_type)
+        return true;
+    }
+  }
+  return false;
+}