Remove a bunch of stuff in //mojo

components/filesystem/files_test_base.h

 // 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.
 
 #ifndef COMPONENTS_FILESYSTEM_FILES_TEST_BASE_H_
 #define COMPONENTS_FILESYSTEM_FILES_TEST_BASE_H_
 
 #include "base/macros.h"
 #include "components/filesystem/public/interfaces/file_system.mojom.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "services/shell/public/cpp/shell_test.h"
 
 namespace filesystem {
 
+template <typename T1>
+mojo::Callback<void(T1)> Capture(T1* t1) {
+  return [t1](T1 got_t1) { *t1 = std::move(got_t1); };
+}
+
+template <typename T1, typename T2>
+mojo::Callback<void(T1, T2)> Capture(T1* t1, T2* t2) {
+  return [t1, t2](T1 got_t1, T2 got_t2) {
+    *t1 = std::move(got_t1);
+    *t2 = std::move(got_t2);
+  };
+}
+
+template <typename T1, typename T2, typename T3>
+mojo::Callback<void(T1, T2, T3)> Capture(T1* t1, T2* t2, T3* t3) {
+  return [t1, t2, t3](T1 got_t1, T2 got_t2, T3 got_t3) {
+    *t1 = std::move(got_t1);
+    *t2 = std::move(got_t2);
+    *t3 = std::move(got_t3);
+  };
+}
+
 class FilesTestBase : public shell::test::ShellTest {
  public:
   FilesTestBase();
   ~FilesTestBase() override;
 
   // Overridden from shell::test::ShellTest:
   void SetUp() override;
 
  protected:
   // Note: This has an out parameter rather than returning the |DirectoryPtr|,
   // since |ASSERT_...()| doesn't work with return values.
   void GetTemporaryRoot(mojom::DirectoryPtr* directory);
 
   mojom::FileSystemPtr& files() { return files_; }
 
  private:
   mojom::FileSystemPtr files_;
 
   DISALLOW_COPY_AND_ASSIGN(FilesTestBase);
 };
 
 }  // namespace filesystem
 
 #endif  // COMPONENTS_FILESYSTEM_FILES_TEST_BASE_H_