Add our own (mojo::util::)ScopedFILE and replace uses of base::ScopedFILE with it.

mojo/edk/system/platform_handle_dispatcher_unittest.cc

Index: mojo/edk/system/platform_handle_dispatcher_unittest.cc
diff --git a/mojo/edk/system/platform_handle_dispatcher_unittest.cc b/mojo/edk/system/platform_handle_dispatcher_unittest.cc
index 55887a79704c97e4c6081fb7d3c6af0147fddb0f..f3426a20f3a08b1f01dcb31082c0556d6b8141c4 100644
--- a/mojo/edk/system/platform_handle_dispatcher_unittest.cc
+++ b/mojo/edk/system/platform_handle_dispatcher_unittest.cc
@@ -8,10 +8,10 @@
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
-#include "base/files/scoped_file.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/memory/ref_counted.h"
 #include "mojo/edk/test/test_utils.h"
+#include "mojo/edk/util/scoped_file.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace mojo {
@@ -25,7 +25,7 @@ TEST(PlatformHandleDispatcherTest, Basic) {
   static const char kHelloWorld[] = "hello world";
 
   base::FilePath unused;
-  base::ScopedFILE fp(
+  util::ScopedFILE fp(
       CreateAndOpenTemporaryFileInDir(temp_dir.path(), &unused));
   ASSERT_TRUE(fp);
   EXPECT_EQ(sizeof(kHelloWorld),
@@ -68,7 +68,7 @@ TEST(PlatformHandleDispatcherTest, CreateEquivalentDispatcherAndClose) {
   static const char kFooBar[] = "foo bar";
 
   base::FilePath unused;
-  base::ScopedFILE fp(
+  util::ScopedFILE fp(
       CreateAndOpenTemporaryFileInDir(temp_dir.path(), &unused));
   EXPECT_EQ(sizeof(kFooBar), fwrite(kFooBar, 1, sizeof(kFooBar), fp.get()));