Rename FlowGraphOptimizer -> JitOptimizer, clean up optimizer code.

runtime/vm/vm_sources.gypi

 # Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 # This file contains all sources (vm and tests) for the dart virtual machine.
 # Unit test files need to have a '_test' suffix appended to the name.
 {
   'sources': [
     'allocation.cc',
     'allocation.h',
@@ skipping 167 matching lines @@
     'flow_graph_builder_test.cc',
     'flow_graph_compiler.cc',
     'flow_graph_compiler.h',
     'flow_graph_compiler_arm.cc',
     'flow_graph_compiler_arm64.cc',
     'flow_graph_compiler_ia32.cc',
     'flow_graph_compiler_mips.cc',
     'flow_graph_compiler_x64.cc',
     'flow_graph_inliner.cc',
     'flow_graph_inliner.h',
-    'flow_graph_optimizer.cc',
-    'flow_graph_optimizer.h',
     'flow_graph_range_analysis.cc',
     'flow_graph_range_analysis.h',
     'flow_graph_range_analysis_test.cc',
     'flow_graph_type_propagator.cc',
     'flow_graph_type_propagator.h',
     'freelist.cc',
     'freelist.h',
     'freelist_test.cc',
     'gc_marker.cc',
     'gc_marker.h',
@@ skipping 43 matching lines @@
     'intrinsifier.cc',
     'intrinsifier.h',
     'intrinsifier_arm.cc',
     'intrinsifier_arm64.cc',
     'intrinsifier_ia32.cc',
     'intrinsifier_mips.cc',
     'intrinsifier_x64.cc',
     'isolate.cc',
     'isolate.h',
     'isolate_test.cc',
+    'jit_optimizer.cc',
+    'jit_optimizer.h',
     'json_stream.h',
     'json_stream.cc',
     'json_test.cc',
     'locations.cc',
     'locations.h',
     'lockers.cc',
     'lockers.h',
     'log_test.cc',
     'log.cc',
     'log.h',
@@ skipping 238 matching lines @@
     'visitor.h',
     'weak_code.cc',
     'weak_code.h',
     'weak_table.cc',
     'weak_table.h',
     'zone.cc',
     'zone.h',
     'zone_test.cc',
   ],
 }