Fixed compilation time measurement, restructure some code.

runtime/vm/flow_graph_compiler_arm.cc

 // Copyright (c) 2012, 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.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_ARM.
 #if defined(TARGET_ARCH_ARM)
 
 #include "vm/flow_graph_compiler.h"
 
 #include "vm/longjump.h"
 
 namespace dart {
 
 void FlowGraphCompiler::Bailout(const char* reason) {
   const char* kFormat = "FlowGraphCompiler Bailout: %s.";
   intptr_t len = OS::SNPrint(NULL, 0, kFormat, reason) + 1;
   char* chars = reinterpret_cast<char*>(
       Isolate::Current()->current_zone()->Allocate(len));
   OS::SNPrint(chars, len, kFormat, reason);
   const Error& error = Error::Handle(
       LanguageError::New(String::Handle(String::New(chars))));
   Isolate::Current()->long_jump_base()->Jump(1, error);
 }
 
 
 void FlowGraphCompiler::CompileGraph() {
-  TimerScope timer(FLAG_compiler_stats, &CompilerStats::graphcompiler_timer);
   Bailout("CompileGraph");
 }
 
 
 void FlowGraphCompiler::FinalizePcDescriptors(const Code& code) {
   UNIMPLEMENTED();
 }
 
 
 void FlowGraphCompiler::FinalizeStackmaps(const Code& code) {
   UNIMPLEMENTED();
 }
 
 
 void FlowGraphCompiler::FinalizeVarDescriptors(const Code& code) {
   UNIMPLEMENTED();
 }
 
 
 void FlowGraphCompiler::FinalizeExceptionHandlers(const Code& code) {
   UNIMPLEMENTED();
 }
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM