Use Stub CDM for building libwidevinecdmadapter.so

third_party/widevine/cdm/BUILD.gn

Index: third_party/widevine/cdm/BUILD.gn
diff --git a/third_party/widevine/cdm/BUILD.gn b/third_party/widevine/cdm/BUILD.gn
index dda97991ca4b0c533ae7a5830d9e9d9195a86811..537a623f28d51fae2099c45d3dff8827d7ce272f 100644
--- a/third_party/widevine/cdm/BUILD.gn
+++ b/third_party/widevine/cdm/BUILD.gn
@@ -23,12 +23,14 @@ if (is_android) {
   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 = [
@@ -82,6 +84,18 @@ source_set("headers") {
   ]
 }
 
+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
@@ -93,10 +107,12 @@ if (widevine_cdm_binary_files != []) {
     # '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",
@@ -106,10 +122,13 @@ if (widevine_cdm_binary_files != []) {
 
     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.
@@ -167,7 +186,7 @@ if ((is_chrome_branded || enable_widevine) && enable_pepper_cdms) {
 
     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 =