Return NOT_FOUND error for an attempt to create a file under nonexistent directory.

base/file_util_proxy.cc

Index: base/file_util_proxy.cc
diff --git a/base/file_util_proxy.cc b/base/file_util_proxy.cc
index b3b18f838c4baa6f01562890bde0e4b44ebc14d1..3175fb2520e7e305b5252e8eebfdc2d6221e41e9 100644
--- a/base/file_util_proxy.cc
+++ b/base/file_util_proxy.cc
@@ -136,6 +136,11 @@ class RelayCreateOrOpen : public MessageLoopRelay {
   }
 
   virtual void RunWork() {
+    if (!file_util::DirectoryExists(file_path_.DirName())) {
+      // If its parent does not exist, should return NOT_FOUND error.
+      set_error_code(base::PLATFORM_FILE_ERROR_NOT_FOUND);
+      return;
+    }
     base::PlatformFileError error_code = base::PLATFORM_FILE_OK;
     file_handle_ = base::CreatePlatformFile(file_path_, file_flags_,
                                             &created_, &error_code);