Plugin Power Saver: Add comprehensive browser tests.

ppapi/tests/power_saver_test_plugin.cc

+// 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.
+
+#include <algorithm>
+
+#include "ppapi/cpp/instance.h"
+#include "ppapi/cpp/module.h"
+#include "ppapi/cpp/var.h"
+#include "ppapi/cpp/var_dictionary.h"
+#include "ppapi/tests/test_utils.h"
+
+// When compiling natively on Windows, PostMessage can be #define-d to
+// something else.
+#ifdef PostMessage
+#undef PostMessage
+#endif
+
+// This is a simple C++ Pepper plugin that enables Plugin Power Saver tests.
+class PowerSaverTestInstance : public pp::Instance {
+ public:
+  explicit PowerSaverTestInstance(PP_Instance instance)
+      : pp::Instance(instance) {}
+  virtual ~PowerSaverTestInstance() {}
+  virtual void HandleMessage(const pp::Var& message_data);
+};
+
+// When postMessage("isPeripheral") is called on the DOM element associated
+// with this plugin instance, we respond with a Javascript object containing
+// a boolean indicating if the plugin has been marked peripheral.
+void PowerSaverTestInstance::HandleMessage(const pp::Var& message_data) {
+  if (message_data.is_string() && (message_data.AsString() == "isPeripheral")) {
+    pp::VarDictionary message;
+    message.Set(
+        "isPeripheral",
+        pp::Var(PP_ToBool(GetTestingInterface()->IsPeripheral(pp_instance()))));
+    PostMessage(message);
+  }
+}
+
+class PowerSaverTestModule : public pp::Module {
+ public:
+  PowerSaverTestModule() : pp::Module() {}
+  virtual ~PowerSaverTestModule() {}
+
+  virtual pp::Instance* CreateInstance(PP_Instance instance) {
+    return new PowerSaverTestInstance(instance);
+  }
+};
+
+namespace pp {
+
+Module* CreateModule() {
+  return new PowerSaverTestModule();
+}
+
+}  // namespace pp