[GN/iOS] Create a symlink to iossim for compatibility with gyp.

testing/iossim/BUILD.gn

Index: testing/iossim/BUILD.gn
diff --git a/testing/iossim/BUILD.gn b/testing/iossim/BUILD.gn
index a31fdcbfae09d7c4594c035e4c8386b934936938..25c5f6498d22d6ad106d0688a8a85fb0c637302f 100644
--- a/testing/iossim/BUILD.gn
+++ b/testing/iossim/BUILD.gn
@@ -3,54 +3,63 @@
 # found in the LICENSE file.
 
 import("//build/config/mac/mac_sdk.gni")
+import("//build/symlink.gni")
 import("//third_party/class-dump/class-dump.gni")
 
-config("config") {
-  visibility = [ ":iossim" ]
+if (current_toolchain == host_toolchain) {
+  config("config") {
+    visibility = [ ":iossim" ]
 
-  include_dirs = [ "$root_gen_dir/iossim" ]
+    include_dirs = [ "$root_gen_dir/iossim" ]
 
-  # TODO(crbug.com/595295): Building class-dump tools requires OS X SDK
-  # version 10.9 or higher. Remove this override once the global version
-  # of the SDK is raised.
-  common_flags = [ "-mmacosx-version-min=10.9" ]
-  ldflags = common_flags
-  cflags_objcc = common_flags
-}
+    # TODO(crbug.com/595295): Building class-dump tools requires OS X SDK
+    # version 10.9 or higher. Remove this override once the global version
+    # of the SDK is raised.
+    common_flags = [ "-mmacosx-version-min=10.9" ]
+    ldflags = common_flags
+    cflags_objcc = common_flags
+  }
 
-executable("iossim") {
-  sources = [
-    "iossim.mm",
-  ]
-  libs = [ "Foundation.framework" ]
-  deps = [
-    ":generate_dvt_core_simulator",
-    ":generate_dvt_foundation_header",
-    ":generate_dvt_iphone_sim_header",
-  ]
-  configs += [ ":config" ]
-
-  # TODO(crbug.com/595295): Building class-dump tools requires OS X SDK
-  # version 10.9 or higher. To prevent mixing code using different value
-  # of minimum SDK supported, forbids dependencies on any Chromium target.
-  assert_no_deps = [ "//base/*" ]
-}
+  executable("iossim") {
+    sources = [
+      "iossim.mm",
+    ]
+    libs = [ "Foundation.framework" ]
+    deps = [
+      ":generate_dvt_core_simulator",
+      ":generate_dvt_foundation_header",
+      ":generate_dvt_iphone_sim_header",
+    ]
+    configs += [ ":config" ]
 
-class_dump("generate_dvt_core_simulator") {
-  framework_name = "CoreSimulator"
-  framework_path = "$mac_sdk_path/../../../../../Library/PrivateFrameworks"
-  class_dump_filter = "Sim"
-}
+    # TODO(crbug.com/595295): Building class-dump tools requires OS X SDK
+    # version 10.9 or higher. To prevent mixing code using different value
+    # of minimum SDK supported, forbids dependencies on any Chromium target.
+    assert_no_deps = [ "//base/*" ]
+  }
 
-class_dump("generate_dvt_foundation_header") {
-  framework_name = "DVTFoundation"
-  framework_path = "$mac_sdk_path/../../../../../../SharedFrameworks"
-  class_dump_filter = "DVTStackBacktrace|DVTInvalidation|DVTMixIn"
-}
+  class_dump("generate_dvt_core_simulator") {
+    framework_name = "CoreSimulator"
+    framework_path = "$mac_sdk_path/../../../../../Library/PrivateFrameworks"
+    class_dump_filter = "Sim"
+  }
+
+  class_dump("generate_dvt_foundation_header") {
+    framework_name = "DVTFoundation"
+    framework_path = "$mac_sdk_path/../../../../../../SharedFrameworks"
+    class_dump_filter = "DVTStackBacktrace|DVTInvalidation|DVTMixIn"
+  }
 
-class_dump("generate_dvt_iphone_sim_header") {
-  topological_sort = true
-  framework_name = "DVTiPhoneSimulatorRemoteClient"
-  framework_path = "$mac_sdk_path/../../../../../../SharedFrameworks"
-  class_dump_filter = "iPhoneSimulator"
+  class_dump("generate_dvt_iphone_sim_header") {
+    topological_sort = true
+    framework_name = "DVTiPhoneSimulatorRemoteClient"
+    framework_path = "$mac_sdk_path/../../../../../../SharedFrameworks"
+    class_dump_filter = "iPhoneSimulator"
+  }
+} else if (current_toolchain == default_toolchain) {
+  binary_symlink("iossim") {
+    # This creates an 'iossim' target in root_build_dir for compatibility
+    # with GYP and the test scripts.
+    binary_label = ":iossim($host_toolchain)"
+  }
 }