Prepare the code to run ios tests with the standalone recipe.

The flags isolated-script-test-output and isolated-script-test-perf-output need to be consumed by the tests.

The generated .app folder in added in the data list of the gni file.
This will make it available in the runtime_deps file and thus will be populated to the swarming tasks.

Bug: webrtc:13556
Change-Id: I2c75774b847d9f686c3abc00ba0400bbc3fcefae
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/240520
Reviewed-by: Artem Titov <titovartem@webrtc.org>
Reviewed-by: Christoffer Jansson <jansson@google.com>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Jeremy Leconte <jleconte@google.com>
Cr-Commit-Position: refs/heads/main@{#36029}

test/test_main_lib.cc

@@ -57,7 +57,7 @@ ABSL_FLAG(
     "described by histogram.proto in "
     "https://chromium.googlesource.com/catapult/.");
 
-#else
+#endif
 
 ABSL_FLAG(std::string,
           isolated_script_test_output,
@@ -72,8 +72,6 @@ ABSL_FLAG(
     "described by histogram.proto in "
     "https://chromium.googlesource.com/catapult/.");
 
-#endif
-
 constexpr char kPlotAllMetrics[] = "all";
 ABSL_FLAG(std::vector<std::string>,
           plot,

tools_webrtc/mb/mb.py

@@ -900,6 +900,7 @@ class MetaBuildWrapper:
 
     is_android = 'target_os="android"' in vals['gn_args']
     is_linux = self.platform.startswith('linux') and not is_android
+    is_ios = 'target_os="ios"' in vals['gn_args']
 
     if test_type == 'nontest':
       self.WriteFailureAndRaise('We should not be isolating %s.' % target,
@@ -932,6 +933,12 @@ class MetaBuildWrapper:
           '--logcat-output-file', '${ISOLATED_OUTDIR}/logcats',
           '--store-tombstones'
       ]
+    elif is_ios:
+      cmdline += [
+          vpython_exe, '../../tools_webrtc/flags_compatibility.py',
+          'bin/run_%s' % target, '--out-dir', '${ISOLATED_OUTDIR}'
+      ]
+      extra_files.append('../../tools_webrtc/flags_compatibility.py')
     else:
       if test_type == 'raw':
         cmdline += [vpython_exe, '../../tools_webrtc/flags_compatibility.py']

webrtc.gni

@@ -530,6 +530,15 @@ template("rtc_test") {
             [ "//third_party/llvm-build/Release+Asserts/lib/libstdc++.so.6" ]
       }
     }
+    # TODO(crbug.com/webrtc/13556): Adding the .app folder in the runtime_deps
+    # shoulnd't be necessary. this code should be removed and the same solution
+    # as Chromium should be used.
+    if (is_ios) {
+      if (!defined(invoker.data)) {
+        data = []
+      }
+      data += [ "${root_out_dir}/${target_name}.app" ]
+    }
   }
 }