Use Stub CDM for building libwidevinecdmadapter.so

third_party/widevine/cdm/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/chrome_build.gni")
 import("//build/config/features.gni")
 import("//chrome/process_version_rc_template.gni")
 import("//media/cdm/ppapi/cdm_paths.gni")
 import("//media/cdm/ppapi/ppapi_cdm_adapter.gni")
 import("//ppapi/features/features.gni")
 import("//third_party/widevine/cdm/widevine.gni")
 
 widevine_arch = current_cpu
 if (widevine_arch == "x86") {
   widevine_arch = "ia32"
 }
 
 widevine_cdm_binary_files = []
 widevine_cdm_manifest_file = []
 
 if (is_android) {
   # Always available on Android regardless of branding.
   widevine_cdm_version_h_file = "android/widevine_cdm_version.h"
 } else if (is_chrome_branded) {
   if (is_chromeos) {
+    # TODO(hmchen): Revert this change and the other in is_linux after the
+    # libwidevinecdm.so issue is fixed.

[xhwang, 2017/04/01 00:56:41]

Please file a bug and add bug number here for tracking.

+    enable_widevine = true
     widevine_cdm_version_h_file =
         "chromeos/$widevine_arch/widevine_cdm_version.h"
-    widevine_cdm_binary_files = [ "chromeos/$widevine_arch/libwidevinecdm.so" ]
   } else if (is_linux) {
+    enable_widevine = true
     widevine_cdm_version_h_file = "linux/$widevine_arch/widevine_cdm_version.h"
-    widevine_cdm_binary_files = [ "linux/$widevine_arch/libwidevinecdm.so" ]
   } else if (is_win) {
     widevine_cdm_version_h_file = "win/$widevine_arch/widevine_cdm_version.h"
     widevine_cdm_binary_files = [
       "win/$widevine_arch/widevinecdm.dll",
       "win/$widevine_arch/widevinecdm.dll.lib",
       "win/$widevine_arch/widevinecdm.dll.sig",
     ]
     widevine_cdm_manifest_file = [ "win/$widevine_arch/manifest.json" ]
   } else if (is_mac) {
     widevine_cdm_version_h_file = "mac/$widevine_arch/widevine_cdm_version.h"
@@ skipping 33 matching lines @@
     "widevine_cdm_common.h",
   ]
 
   public_deps = [
     ":version_h",  # Forward permission to use version header.
     "//media:media_features",
     "//ppapi/features",
   ]
 }
 
+copy("copy_widevinecdm") {
+  if (is_linux) {
+    widevine_cdm_binary_files = [ "linux/$widevine_arch/libwidevinecdm.so" ]
+  } else if (is_chromeos) {
+    widevine_cdm_binary_files = [ "chromeos/$widevine_arch/libwidevinecdm.so" ]
+  }
+  sources = widevine_cdm_binary_files
+  outputs = [
+    "$root_out_dir/$widevine_cdm_path/{{source_file_part}}",
+  ]
+}
+
 if (widevine_cdm_binary_files != []) {
   copy("widevinecdm") {
     sources = widevine_cdm_binary_files
     outputs = [
       "$root_out_dir/$widevine_cdm_path/{{source_file_part}}",
     ]
 
     # TODO(jrummell)
     # 'COPY_PHASE_STRIP': 'NO',
   }
 } else if (enable_widevine && enable_pepper_cdms) {
-  assert(!is_chrome_branded, "Branded Chrome should have binary files to copy.")
+  if (!is_linux && !is_chromeos) {
+    assert(!is_chrome_branded, "Branded Chrome should have binary files to copy.")
+  }
   assert(!is_android, "Android should not have enable_pepper_cdms.")
   shared_library("widevinecdm") {
-    output_dir = "$root_out_dir/$widevine_cdm_path"
+    output_dir = "$root_out_dir/$widevine_cdm_path/stub_cdm"
     sources = [
       "//media/cdm/stub/stub_cdm.cc",
       "//media/cdm/stub/stub_cdm.h",
     ]
 
     defines = [ "CDM_IMPLEMENTATION" ]
 
     deps = [
       ":version_h",
+      ":copy_widevinecdm",
       "//base",
       "//build/config/sanitizers:deps",
     ]
 
+    public_deps = [ ":copy_widevinecdm" ]
+
     if (is_mac) {
       ldflags = [
         # Not to strip important symbols by -Wl,-dead_strip.
         "-Wl,-exported_symbol,_PPP_GetInterface",
         "-Wl,-exported_symbol,_PPP_InitializeModule",
         "-Wl,-exported_symbol,_PPP_ShutdownModule",
       ]
       #TODO(jrummell) Mac: 'DYLIB_INSTALL_NAME_BASE': '@loader_path',
     } else if (is_posix && !is_mac) {
       cflags = [ "-fvisibility=hidden" ]
@@ skipping 37 matching lines @@
       ":widevinecdm",
       ":widevinecdmadapter_resources",
     ]
     data_deps = [
       ":widevine_cdm_manifest",
       ":widevinecdm",
     ]
 
     if (is_linux) {
       ldflags =
-          [ rebase_path("$root_out_dir/$widevine_cdm_path/libwidevinecdm.so",
+          [ rebase_path("$root_out_dir/$widevine_cdm_path/stub_cdm/libwidevinecdm.so",
                         root_build_dir) ]
     } else if (is_win) {
       ldflags =
           [ rebase_path("$root_out_dir/$widevine_cdm_path/widevinecdm.dll.lib",
                         root_build_dir) ]
     } else if (is_mac) {
       ldflags =
           [ rebase_path("$root_out_dir/$widevine_cdm_path/libwidevinecdm.dylib",
                         root_build_dir) ]
     }
@@ skipping 23 matching lines @@
       "../scripts/signer.py",
     ]
     outputs = [
       "$root_out_dir/installer/widevine/{{source_file_part}}",
     ]
   }
 } else {
   group("widevine_signature_scripts") {
   }
 }