Isolate gin_unittests and add them to bots

gin/shell/gin_shell_unittest.cc

 // 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 "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/path_service.h"
 #include "base/process/launch.h"
 #include "base/strings/string_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 base::FilePath GinShellPath() {
   base::FilePath dir;
   PathService::Get(base::DIR_EXE, &dir);
+#if defined(OS_WIN)
+  return dir.AppendASCII("gin_shell.exe");
+#else
   return dir.AppendASCII("gin_shell");
+#endif
 }
 
 base::FilePath HelloWorldPath() {
   base::FilePath path;
   PathService::Get(base::DIR_SOURCE_ROOT, &path);
   return path
     .AppendASCII("gin")
     .AppendASCII("shell")
     .AppendASCII("hello_world.js");
 }
 
 TEST(GinShellTest, HelloWorld) {
   base::FilePath gin_shell_path(GinShellPath());
   base::FilePath hello_world_path(HelloWorldPath());
   ASSERT_TRUE(base::PathExists(gin_shell_path));
   ASSERT_TRUE(base::PathExists(hello_world_path));
 
   base::CommandLine cmd(gin_shell_path);
   cmd.AppendArgPath(hello_world_path);
   std::string output;
   ASSERT_TRUE(base::GetAppOutput(cmd, &output));
   base::TrimWhitespaceASCII(output, base::TRIM_ALL, &output);
   ASSERT_EQ("Hello World", output);
 }