Base: Change ReadPlatformFile to perform a best

base/platform_file_win.cc

Index: base/platform_file_win.cc
===================================================================
--- base/platform_file_win.cc	(revision 99047)
+++ base/platform_file_win.cc	(working copy)
@@ -134,6 +134,11 @@
   return -1;
 }
 
+int ReadPlatformFileNoBestEffort(PlatformFile file, int64 offset,
+                                 char* data, int size) {
+  return ReadPlatformFile(file, offset, data, size);
+}
+
 int WritePlatformFile(PlatformFile file, int64 offset,
                       const char* data, int size) {
   base::ThreadRestrictions::AssertIOAllowed();