Remove stray platform_file.h from content

content/browser/loader/resource_loader_unittest.cc

 // Copyright (c) 2013 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 "content/browser/loader/resource_loader.h"
 
 #include "base/file_util.h"
 #include "base/files/file.h"
 #include "base/message_loop/message_loop_proxy.h"
-#include "base/platform_file.h"
 #include "base/run_loop.h"
 #include "content/browser/browser_thread_impl.h"
 #include "content/browser/loader/redirect_to_file_resource_handler.h"
 #include "content/browser/loader/resource_loader_delegate.h"
 #include "content/public/browser/resource_request_info.h"
 #include "content/public/common/resource_response.h"
 #include "content/public/test/mock_resource_context.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "content/test/test_content_browser_client.h"
 #include "ipc/ipc_message.h"
@@ skipping 714 matching lines @@
   ASSERT_TRUE(base::ReadFileToString(temp_path(), &contents));
   EXPECT_EQ(test_data(), contents);
 
   // Release the loader. The file should be gone now.
   ReleaseLoader();
   base::RunLoop().RunUntilIdle();
   EXPECT_FALSE(base::PathExists(temp_path()));
 }
 
 }  // namespace content