Convert some constants declared as anonymous enums into static consts so they have types. This d...

ipc/file_descriptor_set_posix.h

Index: ipc/file_descriptor_set_posix.h
===================================================================
--- ipc/file_descriptor_set_posix.h	(revision 98481)
+++ ipc/file_descriptor_set_posix.h	(working copy)
@@ -31,9 +31,7 @@
   //
   // In debugging mode, it's a fatal error to try and add more than this number
   // of descriptors to a FileDescriptorSet.
-  enum {
-    MAX_DESCRIPTORS_PER_MESSAGE = 5,
-  };
+  static const size_t kMaxDescriptorsPerMessage = 5;
 
   // ---------------------------------------------------------------------------
   // Interfaces for building during message serialisation...