Update //base to chromium 9659b08ea5a34f889dc4166217f438095ddc10d2

base/files/file.cc

Index: base/files/file.cc
diff --git a/base/files/file.cc b/base/files/file.cc
index 58f80c52322ec38125e1acbe3fda1120f64aa912..9a4ddb1de4a17e174f569a648096e631ad857f8f 100644
--- a/base/files/file.cc
+++ b/base/files/file.cc
@@ -52,22 +52,30 @@ File::File(Error error_details)
 
 File::File(RValue other)
     : file_(other.object->TakePlatformFile()),
-      path_(other.object->path_),
+      tracing_path_(other.object->tracing_path_),
       error_details_(other.object->error_details()),
       created_(other.object->created()),
-      async_(other.object->async_) {
-}
+      async_(other.object->async_) {}
 
 File::~File() {
   // Go through the AssertIOAllowed logic.
   Close();
 }
 
+// static
+File File::CreateForAsyncHandle(PlatformFile platform_file) {
+  File file(platform_file);
+  // It would be nice if we could validate that |platform_file| was opened with
+  // FILE_FLAG_OVERLAPPED on Windows but this doesn't appear to be possible.
+  file.async_ = true;
+  return file.Pass();
+}
+
 File& File::operator=(RValue other) {
   if (this != other.object) {
     Close();
     SetPlatformFile(other.object->TakePlatformFile());
-    path_ = other.object->path_;
+    tracing_path_ = other.object->tracing_path_;
     error_details_ = other.object->error_details();
     created_ = other.object->created();
     async_ = other.object->async_;
@@ -81,9 +89,10 @@ void File::Initialize(const FilePath& path, uint32 flags) {
     error_details_ = FILE_ERROR_ACCESS_DENIED;
     return;
   }
-  path_ = path;
+  if (FileTracing::IsCategoryEnabled())
+    tracing_path_ = path;
   SCOPED_FILE_TRACE("Initialize");
-  DoInitialize(flags);
+  DoInitialize(path, flags);
 }
 #endif