Add an abstract interface to SourceLineResolver, and allow any implementation

to be used with MinidumpProcessor.  The basic SourceLineResolver is now a
public interface (#89)



git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@83 4c0a9323-5329-0410-9bdc-e9ce6186880e

src/processor/stackwalker_ppc.h

@@ -56,7 +56,8 @@ class StackwalkerPPC : public Stackwalker {
   StackwalkerPPC(const MDRawContextPPC *context,
                  MemoryRegion *memory,
                  const CodeModules *modules,
-                 SymbolSupplier *supplier);
+                 SymbolSupplier *supplier,
+                 SourceLineResolverInterface *resolver);
 
  private:
   // Implementation of Stackwalker, using ppc context (stack pointer in %r1,