Fix to ensure the product mode builds again.

runtime/vm/compiler.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/compiler.h"
 
 #include "vm/assembler.h"
 
 #include "vm/ast_printer.h"
 #include "vm/block_scheduler.h"
@@ skipping 1230 matching lines @@
 
 
 RawError* Compiler::CompileFunction(Thread* thread,
                                     const Function& function) {
 #ifdef DART_PRECOMPILER
   if (FLAG_precompiled_mode) {
     return Precompiler::CompileFunction(thread, function);
   }
 #endif
   Isolate* isolate = thread->isolate();
+NOT_IN_PRODUCT(
   VMTagScope tagScope(thread, VMTag::kCompileUnoptimizedTagId);
   TIMELINE_FUNCTION_COMPILATION_DURATION(thread, "CompileFunction", function);
+)  // !PRODUCT
 
   if (!isolate->compilation_allowed()) {
     FATAL3("Precompilation missed function %s (%s, %s)\n",
            function.ToLibNamePrefixedQualifiedCString(),
            function.token_pos().ToCString(),
            Function::KindToCString(function.kind()));
   }
 
   CompilationPipeline* pipeline =
       CompilationPipeline::New(thread->zone(), function);
@@ skipping 34 matching lines @@
   if (FLAG_trace_compiler) {
     THR_Print("Ensure unoptimized code for %s\n", function.ToCString());
   }
   return Error::null();
 }
 
 
 RawError* Compiler::CompileOptimizedFunction(Thread* thread,
                                              const Function& function,
                                              intptr_t osr_id) {
+NOT_IN_PRODUCT(
   VMTagScope tagScope(thread, VMTag::kCompileOptimizedTagId);
   const char* event_name = IsBackgroundCompilation()
       ? "BackgroundCompileOptimizedFunction"
       : "CompileOptimizedFunction";
   TIMELINE_FUNCTION_COMPILATION_DURATION(thread, event_name, function);
+)  // !PRODUCT
 
   // Optimization must happen in non-mutator/Dart thread if background
   // compilation is on. OSR compilation still occurs in the main thread.
   ASSERT((osr_id != kNoOSRDeoptId) || !FLAG_background_compilation ||
          !thread->IsMutatorThread());
   CompilationPipeline* pipeline =
       CompilationPipeline::New(thread->zone(), function);
   return CompileFunctionHelper(pipeline,
                                function,
                                true,  /* optimized */
@@ skipping 557 matching lines @@
 }
 
 
 void BackgroundCompiler::EnsureInit(Thread* thread) {
   UNREACHABLE();
 }
 
 #endif  // DART_PRECOMPILED_RUNTIME
 
 }  // namespace dart