Revert of [Cronet] Use gn desc to find third party licenses on Android.

components/cronet/tools/cronet_licenses.py

Index: components/cronet/tools/cronet_licenses.py
diff --git a/components/cronet/tools/cronet_licenses.py b/components/cronet/tools/cronet_licenses.py
index 10cbe71fc432bed405aea6dbf3408e1c59f665ce..160d13928686b02cc43dd60efec79311df51b41f 100755
--- a/components/cronet/tools/cronet_licenses.py
+++ b/components/cronet/tools/cronet_licenses.py
@@ -23,7 +23,6 @@
 sys.path.append(os.path.join(REPOSITORY_ROOT, 'tools'))
 import licenses
 
-# TODO(mef): Remove hard-coded list once GYP support is deprecated.
 third_party_dirs = [
   'base/third_party/libevent',
   'third_party/ashmem',
@@ -52,7 +51,7 @@
   content = [_ReadFile('LICENSE')]
 
   # Add necessary third_party.
-  for directory in sorted(third_party_dirs, key=os.path.basename):
+  for directory in sorted(third_party_dirs):
     metadata = licenses.ParseDir(directory, REPOSITORY_ROOT,
                                  require_license_file=True)
     content.append('-' * 20)
@@ -70,8 +69,8 @@
   # Current gn directory cannot ba used because gn doesn't allow recursive
   # invocations due to potential side effects.
   try:
-    tmp_dir = tempfile.mkdtemp(dir = os.path.join(gn_out_dir, ".."))
-    shutil.copy(os.path.join(gn_out_dir, "args.gn"), tmp_dir)
+    tmp_dir = tempfile.mkdtemp(dir = gn_out_dir)
+    shutil.copy(gn_out_dir + "/args.gn", tmp_dir)
     subprocess.check_output(["gn", "gen", tmp_dir])
     gn_deps = subprocess.check_output(["gn", "desc", tmp_dir, \
                                     "//net", "deps", "--as=buildfile", "--all"])
@@ -81,10 +80,9 @@
 
   third_party_deps = []
   for build_dep in gn_deps.split():
-    # Look for third party deps that have separate license.
-    if ("third_party" in build_dep and not "android_tools" in build_dep and
-        os.path.basename(build_dep) == "BUILD.gn"):
-      third_party_deps.append(os.path.dirname(build_dep))
+    if ("third_party" in build_dep and build_dep.endswith("/BUILD.gn")):
+      third_party_deps.append(build_dep.replace("/BUILD.gn", ""))
+  third_party_deps.sort()
   return third_party_deps