Added WARN_UNUSED_RESULT to ScopedTempDir methods.

base/scoped_temp_dir.h

Index: base/scoped_temp_dir.h
diff --git a/base/scoped_temp_dir.h b/base/scoped_temp_dir.h
index f44bcca8751d79d99aebe8ff6115eb6229719f63..4286d28c3fb0e98b8b9b1c38c29b796af950286f 100644
--- a/base/scoped_temp_dir.h
+++ b/base/scoped_temp_dir.h
@@ -28,17 +28,17 @@ class ScopedTempDir {
 
   // Creates a unique directory in TempPath, and takes ownership of it.
   // See file_util::CreateNewTemporaryDirectory.
-  bool CreateUniqueTempDir();
+  bool CreateUniqueTempDir() WARN_UNUSED_RESULT;
 
   // Creates a unique directory under a given path, and takes ownership of it.
-  bool CreateUniqueTempDirUnderPath(const FilePath& path);
+  bool CreateUniqueTempDirUnderPath(const FilePath& path) WARN_UNUSED_RESULT;
 
   // Takes ownership of directory at |path|, creating it if necessary.
   // Don't call multiple times unless Take() has been called first.
-  bool Set(const FilePath& path);
+  bool Set(const FilePath& path) WARN_UNUSED_RESULT;
 
   // Deletes the temporary directory wrapped by this object.
-  bool Delete();
+  bool Delete() WARN_UNUSED_RESULT;
 
   // Caller takes ownership of the temporary directory so it won't be destroyed
   // when this object goes out of scope.