Breakpad: Don't use the deprecated __gnu_cxx::hash_map container.

Modern GNU compilers warn about the #inclusion of <ext/hash_map>; that
container is deprecated, and code should use <tr1/unordered_map>
instead.  However, to stay within the boundaries of C++ '98, it's
probably fine just to use plain old std::map.

Breakpad uses hash_map in three cases:

o The DWARF reader's SectionMap type maps object file section names to
  data.  This map is consulted once per section kind per DWARF
  compilation unit; it is not performance-critical.

o The Mac dump_syms tool uses it to map machine architectures to
  section maps in Universal binaries.  It's hard to imagine there
  ever being more than two entries in such a map.

o The processor's BasicSourceLineResolver uses a hash_map to map file
  numbers to file names.  This is the map that will probably have the
  most entries, but it's only accessed once per frame, after we've
  found the frame's line entry.

a=jimblandy
r=nealsid


git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@393 4c0a9323-5329-0410-9bdc-e9ce6186880e

src/processor/basic_source_line_resolver.cc

@@ -51,9 +51,6 @@
 using std::map;
 using std::vector;
 using std::make_pair;
-#ifndef BSLR_NO_HASH_MAP
-using __gnu_cxx::hash;
-#endif  // BSLR_NO_HASH_MAP
 
 namespace google_breakpad {
 
@@ -125,11 +122,7 @@ class BasicSourceLineResolver::Module {
 
  private:
   friend class BasicSourceLineResolver;
-#ifdef BSLR_NO_HASH_MAP
   typedef map<int, string> FileMap;
-#else  // BSLR_NO_HASH_MAP
-  typedef hash_map<int, string> FileMap;
-#endif  // BSLR_NO_HASH_MAP
 
   // The types for stack_info_.  This is equivalent to MS DIA's
   // StackFrameTypeEnum.  Each identifies a different type of frame
@@ -702,15 +695,9 @@ bool BasicSourceLineResolver::Module::ParseStackInfo(char *stack_info_line) {
   return true;
 }
 
-#ifdef BSLR_NO_HASH_MAP
 bool BasicSourceLineResolver::CompareString::operator()(
     const string &s1, const string &s2) const {
   return strcmp(s1.c_str(), s2.c_str()) < 0;
 }
-#else  // BSLR_NO_HASH_MAP
-size_t BasicSourceLineResolver::HashString::operator()(const string &s) const {
-  return hash<const char*>()(s.c_str());
-}
-#endif  // BSLR_NO_HASH_MAP
 
 }  // namespace google_breakpad