media: Use platform specific folders for CDMs

media/cdm/ppapi/cdm_paths.gni

Index: media/cdm/ppapi/cdm_paths.gni
diff --git a/media/cdm/ppapi/cdm_paths.gni b/media/cdm/ppapi/cdm_paths.gni
new file mode 100644
index 0000000000000000000000000000000000000000..cf00c9cb28d7f5e099d392968c7596c1d54a2942
--- /dev/null
+++ b/media/cdm/ppapi/cdm_paths.gni
@@ -0,0 +1,39 @@
+# 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.
+
+# This file defines output paths for the CDM adapters and CDMs.
+
+# Naming and folder structure below are following the recommendation for chrome

[ddorwin, 2016/05/20 04:08:56]

nit: Chrome

[xhwang, 2016/05/20 07:18:19]

Done.

+# components. Component-updated CDMs must following the same recommendation.
+
+# Note: This file must be in sync with cdm_paths.cc
+# TODO(xhwang): Auto generate paths in C++ from build variables so we don't

[ddorwin, 2016/05/20 04:08:56]

ditto - still plan to do?

[xhwang, 2016/05/20 07:18:19]

Done.

+# need this note.
+
+# OS name for components is close to "target_os" but has some differences.
+# Explicitly define what we use to avoid confusion.
+if (is_chromeos) {
+  component_os = "cros"
+} else if (is_linux) {
+  component_os = "linux"
+} else if (is_win) {
+  component_os = "win"
+} else if (is_mac) {
+  component_os = "mac"
+} else {
+  component_os = "$target_os"
+}
+
+if (is_win || is_mac) {

[ddorwin, 2016/05/20 04:08:56]

You should probably explain this and reference
https://bugs.chromium.org/p/chromium/issues/detail?id=468584 to fix it.

[xhwang, 2016/05/20 07:18:19]

Done.

+  # Architecture name for components is the same as "<(target_cpu)".
+  _platform_specific_path =
+      "_platform_specific/$component_os" + "_" + "$target_cpu"
+
+  # Path of Clear Key and Widevine CDMs relative to the output dir.
+  clearkey_cdm_path = "ClearKeyCdm/$_platform_specific_path"
+  widevine_cdm_path = "WidevineCdm/$_platform_specific_path"
+} else {
+  clearkey_cdm_path = "."
+  widevine_cdm_path = "."
+}