1 files changed, 25 insertions, 6 deletions

diff --git a/chromium/webkit/browser/fileapi/quota/open_file_handle.h b/chromium/webkit/browser/fileapi/quota/open_file_handle.h
index 79f1380a437..2bd7e93713a 100644
--- a/chromium/webkit/browser/fileapi/quota/open_file_handle.h
+++ b/chromium/webkit/browser/fileapi/quota/open_file_handle.h
@@ -10,6 +10,10 @@
 #include "base/memory/weak_ptr.h"
 #include "webkit/browser/webkit_storage_browser_export.h"
 
+namespace base {
+class FilePath;
+}
+
 namespace fileapi {
 
 class QuotaReservation;
@@ -24,13 +28,28 @@ class WEBKIT_STORAGE_BROWSER_EXPORT OpenFileHandle {
   ~OpenFileHandle();
 
   // Updates cached file size and consumes quota for that.
-  // This should be called for each modified file before calling RefreshQuota
-  // and file close.
-  // Returns updated base file size that should be used to measure quota
-  // consumption by difference to this.
-  int64 UpdateMaxWrittenOffset(int64 offset);
+  // Both this and AddAppendModeWriteAmount should be called for each modified
+  // file before calling QuotaReservation::RefreshQuota and before closing the
+  // file.
+  void UpdateMaxWrittenOffset(int64 offset);
+
+  // Notifies that |amount| of data is written to the file in append mode, and
+  // consumes quota for that.
+  // Both this and UpdateMaxWrittenOffset should be called for each modified
+  // file before calling QuotaReservation::RefreshQuota and before closing the
+  // file.
+  void AddAppendModeWriteAmount(int64 amount);
+
+  // Returns the estimated file size for the quota consumption calculation.
+  // The client must consume its reserved quota when it writes data to the file
+  // beyond the estimated file size.
+  // The estimated file size is greater than or equal to actual file size after
+  // all clients report their file usage,  and is monotonically increasing over
+  // OpenFileHandle object life cycle, so that client may cache the value.
+  int64 GetEstimatedFileSize() const;
 
-  int64 base_file_size() const;
+  int64 GetMaxWrittenOffset() const;
+  const base::FilePath& platform_path() const;
 
  private:
   friend class QuotaReservationBuffer;