[Mac/GN] Get //ppapi tests and examples working.

ppapi/examples/ppapi_example.gni

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+if (is_mac) {
+  import("//build/config/mac/rules.gni")
+}
+
 # Declares a PPAPI example target of the correct type for the current platform
 # and with the right linker flags.
 template("ppapi_example") {
-  # TODO(GYP) on Mac this should be loadable_module.
-  shared_library(target_name) {
-    testonly = true
-    if (defined(invoker.output_name)) {
-      output_name = invoker.output_name
+  if (!is_mac) {
+    shared_library(target_name) {
+      testonly = true
+
+      if (defined(invoker.output_name)) {
+        output_name = invoker.output_name
+      }
+
+      sources = invoker.sources
+      deps = invoker.deps
     }
-    sources = invoker.sources
-    deps = invoker.deps
+  } else {
+    mac_plugin_bundle(target_name) {
+      testonly = true
 
-    if (is_mac) {
-      # TODO(GYP) this should be a mac bundle
-      output_extension = "plugin"
+      if (defined(invoker.output_name)) {
+        output_name = invoker.output_name
+      }
+
+      sources = invoker.sources
+      deps = invoker.deps
+
       ldflags = [
         # Not to strip important symbols by -Wl,-dead_strip.
         "-Wl,-exported_symbol,_PPP_GetInterface",
         "-Wl,-exported_symbol,_PPP_InitializeModule",
         "-Wl,-exported_symbol,_PPP_ShutdownModule",
       ]
     }
   }
 }