Respect ios_automatically_manage_certs when building EG tests.

When the ios_automatically_manage_certs variable is set to true,
restrict the number of different Bundle Identifiers are used by
the build (as they are currently limited to 10 free certs per day).

BUG=613543

Review-Url: https://codereview.chromium.org/2709223002
Cr-Original-Commit-Position: refs/heads/master@{#452529}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: eb7eea750b9604ca75254a775f9d381514966196

config/ios/ios_sdk.gni

@@ -57,6 +57,8 @@ assert(custom_toolchain == "" || additional_target_cpus == [],
 
 use_ios_simulator = current_cpu == "x86" || current_cpu == "x64"
 
+ios_generic_test_bundle_id_suffix = "generic-unit-test"
+
 # Initialize additional_toolchains from additional_target_cpus. Assert here
 # that the list does not contains $target_cpu nor duplicates as this would
 # cause weird errors during the build.

config/ios/rules.gni

@@ -1386,8 +1386,17 @@ template("ios_xctest_test") {
     ios_info_plist(_xctest_info_plist_target) {
       visibility = [ ":$_xctest_info_plist_bundle" ]
       info_plist = "//build/config/ios/Module-Info.plist"
-      extra_substitutions = [ "MODULE_NAME=$_xctest_output" ]
       executable_name = _host_output
+      if (ios_automatically_manage_certs) {
+        # Use the same bundle identifier for EarlGrey tests as for unit tests
+        # when managing certificates as the number of free certs is limited.
+        extra_substitutions = [
+          "EXECUTABLE_NAME=gtest.${ios_generic_test_bundle_id_suffix}",
+          "MODULE_NAME=${ios_generic_test_bundle_id_suffix}-module",
+        ]
+      } else {
+        extra_substitutions = [ "MODULE_NAME=$_xctest_output" ]
+      }
     }
 
     bundle_data(_xctest_info_plist_bundle) {
@@ -1454,6 +1463,15 @@ template("ios_xctest_test") {
 
     if (!defined(invoker.info_plist) && !defined(invoker.info_plist_target)) {
       info_plist = "//build/config/ios/Host-Info.plist"
+      if (ios_automatically_manage_certs) {
+        # Use the same bundle identifier for EarlGrey tests as for unit tests
+        # when managing certificates as the number of free certs is limited.
+        if (!defined(extra_substitutions)) {
+          extra_substitutions = []
+        }
+        extra_substitutions +=
+            [ "EXECUTABLE_NAME=gtest.${ios_generic_test_bundle_id_suffix}" ]
+      }
     }
 
     # Xcode needs those two framework installed in the application (and signed)