Base: Make FileProxy automaticaly close the file on a worker thread.

base/files/file_proxy_unittest.cc

Index: base/files/file_proxy_unittest.cc
diff --git a/base/files/file_proxy_unittest.cc b/base/files/file_proxy_unittest.cc
index bb7e6c31185422fa39a79383f1ebbaf7a7b5006b..774892371709eb11d1cfdf7810c75792a97b0d52 100644
--- a/base/files/file_proxy_unittest.cc
+++ b/base/files/file_proxy_unittest.cc
@@ -14,6 +14,7 @@
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/threading/thread.h"
+#include "base/threading/thread_restrictions.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace base {
@@ -143,6 +144,21 @@ TEST_F(FileProxyTest, CreateOrOpen_OpenNonExistent) {
   EXPECT_FALSE(PathExists(test_path()));
 }
 
+TEST_F(FileProxyTest, CreateOrOpen_AbandonedCreate) {
+  bool prev = ThreadRestrictions::SetIOAllowed(false);
+  {
+    FileProxy proxy(file_task_runner());
+    proxy.CreateOrOpen(
+        test_path(),
+        File::FLAG_CREATE | File::FLAG_READ,
+        Bind(&FileProxyTest::DidCreateOrOpen, weak_factory_.GetWeakPtr()));
+  }
+  MessageLoop::current()->Run();
+  ThreadRestrictions::SetIOAllowed(prev);
+
+  EXPECT_TRUE(PathExists(test_path()));
+}
+
 TEST_F(FileProxyTest, Close) {
   // Creates a file.
   FileProxy proxy(file_task_runner());