net: FileStream cleanup

base/files/file_posix.cc

Index: base/files/file_posix.cc
diff --git a/base/files/file_posix.cc b/base/files/file_posix.cc
index 0764ee98660239ed813ada6d0dd0a7b15429aeee..59d9e3dd0d047dc2e4301a844da56cb4c364e80a 100644
--- a/base/files/file_posix.cc
+++ b/base/files/file_posix.cc
@@ -280,11 +280,16 @@ void File::Close() {
 int64 File::Seek(Whence whence, int64 offset) {
   base::ThreadRestrictions::AssertIOAllowed();
   DCHECK(IsValid());
-  if (offset < 0)
-    return -1;
 
+#if defined(OS_ANDROID)
+  COMPILE_ASSERT(sizeof(int64) == sizeof(off64_t), off64_t_bit);
+  return lseek64(file_.get(), static_cast<off64_t>(offset),
+                 static_cast<int>(whence));
+#else
+  COMPILE_ASSERT(sizeof(int64) == sizeof(off_t), off_t_64_bit);

[hashimoto, 2014/06/19 01:51:56]

nit: s/off_t_64_bit/off64_t_bit/?

[rvargas (doing something else), 2014/06/19 17:11:43]

Actually, the first message should be off64_t_64_bit instead.

   return lseek(file_.get(), static_cast<off_t>(offset),
                static_cast<int>(whence));
+#endif
 }
 
 int File::Read(int64 offset, char* data, int size) {