Add fileapi::FileSystemFileStreamReader::GetLength()

BUG=141835
TEST=content_unittests --gtest_filter="FileSystemURLRequestJobTest.*"


Review URL: https://chromiumcodereview.appspot.com/11087048

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@161114 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 10 insertions, 8 deletions

diff --git a/webkit/blob/file_stream_reader.h b/webkit/blob/file_stream_reader.h
index 83b8972..95e3571 100644
--- a/webkit/blob/file_stream_reader.h
+++ b/webkit/blob/file_stream_reader.h
@@ -38,6 +38,14 @@ class BLOB_EXPORT FileStreamReader {
   // |callback| will not be called.
   virtual int Read(net::IOBuffer* buf, int buf_len,
                    const net::CompletionCallback& callback) = 0;
+
+  // Returns the length of the file if it could successfully retrieve the
+  // file info *and* its last modification time equals to
+  // expected_modification_time_ (rv >= 0 cases).
+  // Otherwise, a negative error code is returned (rv < 0 cases).
+  // If the stream is deleted while it has an in-flight GetLength operation
+  // |callback| will not be called.
+  virtual int GetLength(const net::Int64CompletionCallback& callback) = 0;
 };
 
 }  // namespace webkit_blob
diff --git a/webkit/blob/local_file_stream_reader.h b/webkit/blob/local_file_stream_reader.h
index 0e7d150..97e08fb 100644
--- a/webkit/blob/local_file_stream_reader.h
+++ b/webkit/blob/local_file_stream_reader.h
@@ -47,14 +47,8 @@ class BLOB_EXPORT LocalFileStreamReader : public FileStreamReader {
   // FileStreamReader overrides.
   virtual int Read(net::IOBuffer* buf, int buf_len,
                    const net::CompletionCallback& callback) OVERRIDE;
-
-  // Returns the length of the file if it could successfully retrieve the
-  // file info *and* its last modification time equals to
-  // expected_modification_time_ (rv >= 0 cases).
-  // Otherwise, a negative error code is returned (rv < 0 cases).
-  // If the stream is deleted while it has an in-flight GetLength operation
-  // |callback| will not be called.
-  int GetLength(const net::Int64CompletionCallback& callback);
+  virtual int GetLength(
+      const net::Int64CompletionCallback& callback) OVERRIDE;
 
  private:
   int Open(const net::CompletionCallback& callback);