Port placeholders logic GYP->GN

BUG=535390,384638

Review URL: https://codereview.chromium.org/1438413004

Cr-Original-Commit-Position: refs/heads/master@{#359944}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 2b9cc87893cdf97eca6ed44224783cea84d469d3

android/gyp/apkbuilder.py

@@ -48,16 +48,19 @@ def _ParseArgs(args):
                       default=[])
   parser.add_argument('--android-abi',
                       help='Android architecture to use for native libraries')
-  parser.add_argument('--create-placeholder-lib',
-                      action='store_true',
-                      help='Whether to add a dummy library file')
+  parser.add_argument('--native-lib-placeholders',
+                      help='GYP-list of native library placeholders to add.',
+                      default='[]')
   options = parser.parse_args(args)
-  if not options.android_abi and (options.native_libs_dir or
-                                  options.create_placeholder_lib):
-    raise Exception('Must specify --android-abi with --native-libs-dir')
   options.assets = build_utils.ParseGypList(options.assets)
   options.uncompressed_assets = build_utils.ParseGypList(
       options.uncompressed_assets)
+  options.native_lib_placeholders = build_utils.ParseGypList(
+      options.native_lib_placeholders)
+
+  if not options.android_abi and (options.native_libs_dir or
+                                  options.native_lib_placeholders):
+    raise Exception('Must specify --android-abi with --native-libs-dir')
   return options
 
 
@@ -119,7 +122,7 @@ def main(args):
   if options.dex_file:
     input_paths.append(options.dex_file)
 
-  input_strings = [options.create_placeholder_lib, options.android_abi]
+  input_strings = [options.android_abi, options.native_lib_placeholders]
 
   for path in itertools.chain(options.assets, options.uncompressed_assets):
     src_path, dest_path = _SplitAssetPath(path)
@@ -141,10 +144,11 @@ def main(args):
         for path in native_libs:
           basename = os.path.basename(path)
           apk.write(path, 'lib/%s/%s' % (options.android_abi, basename))
-        if options.create_placeholder_lib:
+        for name in options.native_lib_placeholders:
           # Make it non-empty so that its checksum is non-zero and is not
           # ignored by md5_check.
-          apk.writestr('lib/%s/libplaceholder.so' % options.android_abi, ':-)')
+          apk.writestr('lib/%s/%s' % (options.android_abi, name), ':)',
+                       zipfile.ZIP_STORED)
         if options.dex_file:
           apk.write(options.dex_file, 'classes.dex')
 

config/android/internal_rules.gni

@@ -545,8 +545,9 @@ template("process_java_prebuilt") {
 #   dex_path: Path to classes.dex file to include (optional).
 #   resource_packaged_apk_path: Path to .ap_ to use.
 #   output_apk_path: Output path for the generated .apk.
+#   native_lib_placeholders: List of placeholder filenames to add to the apk
+#     (optional).
 #   native_libs_dir: Directory containing native libraries.
-#   create_placeholder_lib: Whether to add a dummy lib to the apk.
 template("package_apk") {
   action(target_name) {
     forward_variables_from(invoker,
@@ -555,8 +556,10 @@ template("package_apk") {
                              "public_deps",
                              "testonly",
                            ])
-    _create_placeholder_lib = defined(invoker.create_placeholder_lib) &&
-                              invoker.create_placeholder_lib
+    _native_lib_placeholders = []
+    if (defined(invoker.native_lib_placeholders)) {
+      _native_lib_placeholders = invoker.native_lib_placeholders
+    }
 
     script = "//build/android/gyp/apkbuilder.py"
     depfile = "$target_gen_dir/$target_name.d"
@@ -599,7 +602,7 @@ template("package_apk") {
       _rebased_dex_path = rebase_path(invoker.dex_path, root_build_dir)
       args += [ "--dex-file=$_rebased_dex_path" ]
     }
-    if (defined(invoker.native_libs_dir) || _create_placeholder_lib) {
+    if (defined(invoker.native_libs_dir) || _native_lib_placeholders != []) {
       args += [ "--android-abi=$android_app_abi" ]
     }
     if (defined(invoker.native_libs_dir)) {
@@ -607,8 +610,8 @@ template("package_apk") {
           rebase_path(invoker.native_libs_dir, root_build_dir)
       args += [ "--native-libs-dir=$_rebased_native_libs_dir/$android_app_abi" ]
     }
-    if (_create_placeholder_lib) {
-      args += [ "--create-placeholder-lib" ]
+    if (_native_lib_placeholders != []) {
+      args += [ "--native-lib-placeholders=$_native_lib_placeholders" ]
     }
   }
 }
@@ -878,6 +881,7 @@ template("create_apk") {
     forward_variables_from(invoker,
                            [
                              "assets_build_config",
+                             "native_lib_placeholders",
                              "native_libs_dir",
                            ])
     deps = _deps + [ ":${_package_resources_target_name}" ]
@@ -906,7 +910,7 @@ template("create_apk") {
 
     # http://crbug.com/384638
     if (defined(invoker.native_libs_dir)) {
-      create_placeholder_lib = true
+      native_lib_placeholders = [ "libfix.crbug.384638.so" ]
     }
 
     output_apk_path = _incremental_packaged_apk_path

config/android/rules.gni

@@ -1186,6 +1186,8 @@ template("android_java_prebuilt") {
 #   native_libs: List paths of native libraries to include in this apk. If these
 #     libraries depend on other shared_library targets, those dependencies will
 #     also be included in the apk.
+#   native_lib_placeholders: List of placeholder filenames to add to the apk
+#     (optional).
 #   apk_under_test: For an instrumentation test apk, this is the target of the
 #     tested apk.
 #   include_all_resources - If true include all resource IDs in all generated
@@ -1655,6 +1657,12 @@ template("android_apk") {
 
     if (_native_libs != [] && !_create_abi_split) {
       native_libs_dir = _native_libs_dir
+
+      # Placeholders are not necessary for L+, so add them here, but don't
+      # bother to create them in the case of splits.
+      # http://crbug.com/395038
+      forward_variables_from(invoker, [ "native_lib_placeholders" ])
+
       deps += [ ":$_prepare_native_target_name" ]
     }
   }