Limit use of default namespace in tests and utility programs (#71). r=bryner

- main is now the only thing you'll find in the default namespace.
   Everything else has been moved into an unnamed namespace.

http://groups.google.com/group/airbag-dev/browse_thread/thread/14130a0284a0307f


git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@63 4c0a9323-5329-0410-9bdc-e9ce6186880e

src/processor/minidump_stackwalk.cc

@@ -45,6 +45,8 @@
 #include "processor/scoped_ptr.h"
 #include "processor/simple_symbol_supplier.h"
 
+namespace {
+
 using std::string;
 using google_airbag::CallStack;
 using google_airbag::MinidumpModule;
@@ -218,6 +220,8 @@ static bool PrintMinidumpProcess(const string &minidump_file,
   return true;
 }
 
+}  // namespace
+
 int main(int argc, char **argv) {
   if (argc < 2 || argc > 3) {
     fprintf(stderr, "usage: %s <minidump-file> [symbol-path]\n", argv[0]);