media: Add build flag for CDM host verification

chrome/common/media/cdm_host_file_path.cc

 // 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.
 
 #include "chrome/common/media/cdm_host_file_path.h"
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/path_service.h"
 #include "build/build_config.h"
 #include "chrome/common/chrome_version.h"
 
 #if defined(OS_MACOSX)
 #include "base/mac/bundle_locations.h"
 #include "chrome/common/chrome_constants.h"
 #endif
 
 namespace chrome {
 
+#if defined(GOOGLE_CHROME_BUILD)
+
 namespace {
 
 using content::CdmHostFilePath;
 
 // TODO(xhwang): Move this to a common place if needed.
 const base::FilePath::CharType kSignatureFileExtension[] =
     FILE_PATH_LITERAL(".sig");
 
 // Returns the signature file path given the |file_path|. This function should
 // only be used when the signature file and the file are located in the same
@@ skipping 68 matching lines @@
 
   base::FilePath chrome_path =
       chrome_exe_dir.Append(FILE_PATH_LITERAL("chrome"));
   DVLOG(2) << __func__ << ": chrome_path=" << chrome_path.value();
   cdm_host_file_paths->push_back(
       CdmHostFilePath(chrome_path, GetSigFilePath(chrome_path)));
 
 #endif  // defined(OS_WIN)
 }
 
+#else  // defined(GOOGLE_CHROME_BUILD)
+
+void AddCdmHostFilePaths(
+    std::vector<content::CdmHostFilePath>* cdm_host_file_paths) {
+  NOTIMPLEMENTED() << "CDM host file paths need to be provided for the CDM to "
+                      "verify the host.";
+}
+
+#endif  // defined(GOOGLE_CHROME_BUILD)
+
 }  // namespace chrome