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_map-inl.h b/compiler/driver/compiler_options_map-inl.h
index e28d499..f97ab08 100644
--- a/compiler/driver/compiler_options_map-inl.h
+++ b/compiler/driver/compiler_options_map-inl.h
@@ -78,6 +78,14 @@
   map.AssignIfExists(Base::VerboseMethods, &options->verbose_methods_);
   options->deduplicate_code_ = map.GetOrDefault(Base::DeduplicateCode);
 
+  if (map.Exists(Base::DumpTimings)) {
+    options->dump_timings_ = true;
+  }
+
+  if (map.Exists(Base::DumpStats)) {
+    options->dump_stats_ = true;
+  }
+
   return true;
 }
 
@@ -129,6 +137,12 @@
           .WithValueMap({{"false", false}, {"true", true}})
           .IntoKey(Map::DeduplicateCode)
 
+      .Define({"--dump-timings"})
+          .IntoKey(Map::DumpTimings)
+
+      .Define({"--dump-stats"})
+          .IntoKey(Map::DumpStats)
+
       .Define("--debuggable")
           .IntoKey(Map::Debuggable)