Handle frame pointer omission, (#21), part 4 (final part!): FPO stackwalker.

r=bryner
 - This change allows Airbag to properly walk win32 stacks produced by code
   built with MSVC's frame pointer omission optimization (/Oy).  This
   optimization is enabled at /O1 and /O2.
 - There too many interface and file format changes to list here.

http://groups.google.com/group/airbag-dev/browse_thread/thread/85ce85bfa8457ece


git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@42 4c0a9323-5329-0410-9bdc-e9ce6186880e

src/processor/linked_ptr.h

@@ -53,6 +53,8 @@
 #ifndef PROCESSOR_LINKED_PTR_H__
 #define PROCESSOR_LINKED_PTR_H__
 
+namespace google_airbag {
+
 // This is used internally by all instances of linked_ptr<>.  It needs to be
 // a non-template class because different types of linked_ptr<> can refer to
 // the same object (linked_ptr<Superclass>(obj) vs linked_ptr<Subclass>(obj)).
@@ -186,4 +188,6 @@ linked_ptr<T> make_linked_ptr(T* ptr) {
   return linked_ptr<T>(ptr);
 }
 
-#endif // PROCESSOR_LINKED_PTR_H__
+}  // namespace google_airbag
+
+#endif  // PROCESSOR_LINKED_PTR_H__