Add widevine third party

Add 2 new command options to use widevine:
- widevine-cdm-path: Path to widevine plugin
- widevine-cdm-version: Version of the widevine plugin

chromium_src/chrome/common/chrome_paths.cc

@@ -15,6 +15,7 @@
 #include "base/version.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_paths_internal.h"
+#include "chrome/common/widevine_cdm_constants.h"
 
 #if defined(OS_ANDROID)
 #include "base/android/path_utils.h"
@@ -31,6 +32,8 @@
 #include "base/win/registry.h"
 #endif
 
+#include "third_party/widevine/cdm/stub/widevine_cdm_version.h"
+
 namespace {
 
 // The Pepper Flash plugins are in a directory with this name.
@@ -362,7 +365,7 @@ bool PathProvider(int key, base::FilePath* result) {
     case chrome::DIR_COMPONENT_WIDEVINE_CDM:
       if (!PathService::Get(chrome::DIR_USER_DATA, &cur))
         return false;
-      cur = cur.Append(FILE_PATH_LITERAL("WidevineCDM"));
+      cur = cur.Append(kWidevineCdmBaseDirectory);
       break;
 #endif  // defined(WIDEVINE_CDM_IS_COMPONENT)
     // TODO(xhwang): FILE_WIDEVINE_CDM_ADAPTER has different meanings.