[ChromeDriver] Subscribe PerformanceLogger to CommandListener interface

chrome/test/chromedriver/command_listener_proxy_unittest.cc

Index: chrome/test/chromedriver/command_listener_proxy_unittest.cc
diff --git a/chrome/test/chromedriver/command_listener_proxy_unittest.cc b/chrome/test/chromedriver/command_listener_proxy_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..937605c96aad610b355281d6255fb9992fbbdbc4
--- /dev/null
+++ b/chrome/test/chromedriver/command_listener_proxy_unittest.cc
@@ -0,0 +1,47 @@
+// Copyright 2014 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 <string>
+
+#include "base/compiler_specific.h"
+#include "base/values.h"
+#include "chrome/test/chromedriver/chrome/status.h"
+#include "chrome/test/chromedriver/command_listener_proxy.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+class MockCommandListener : public CommandListener {
+ public:
+  MockCommandListener() : called_(false) {}
+  virtual ~MockCommandListener() {}
+
+  virtual Status BeforeCommand(const std::string& command_name) OVERRIDE {
+    called_ = true;
+    EXPECT_STREQ("cmd", command_name.c_str());
+    return Status(kOk);
+  }
+
+  void VerifyCalled() {
+    EXPECT_TRUE(called_);
+  }
+
+  void VerifyNotCalled() {
+    EXPECT_FALSE(called_);
+  }
+
+ private:
+  bool called_;
+};
+
+}  // namespace
+
+TEST(CommandListenerProxy, ForwardsCommands) {
+  MockCommandListener listener;
+  listener.VerifyNotCalled();
+  CommandListenerProxy proxy(&listener);
+  listener.VerifyNotCalled();
+  ASSERT_EQ(kOk, proxy.BeforeCommand("cmd").code());
+  listener.VerifyCalled();
+}