Clean some dex2oat options.

Remove dump-passes inherited from Quick days,
and move dump-timings and dump-stats to CompilerStats.

Test: test.py
Change-Id: Ie79be858a141e59dc0b2a87d8cb5a5248a5bc7af
diff --git a/compiler/driver/compiler_options.h b/compiler/driver/compiler_options.h
index a71f61a..3f66029 100644
--- a/compiler/driver/compiler_options.h
+++ b/compiler/driver/compiler_options.h
@@ -266,6 +266,14 @@
     return passes_to_run_;
   }
 
+  bool GetDumpTimings() const {
+    return dump_timings_;
+  }
+
+  bool GetDumpStats() const {
+    return dump_stats_;
+  }
+
  private:
   bool ParseDumpInitFailures(const std::string& option, std::string* error_msg);
   void ParseDumpCfgPasses(const StringPiece& option, UsageFn Usage);
@@ -303,6 +311,8 @@
   bool implicit_so_checks_;
   bool implicit_suspend_checks_;
   bool compile_pic_;
+  bool dump_timings_;
+  bool dump_stats_;
 
   // Vector of methods to have verbose output enabled for.
   std::vector<std::string> verbose_methods_;