Fix product build compile and ensure all tests run cleanly again.

runtime/vm/flow_graph_compiler.cc

 // 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.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_XXX.
 
 #include "vm/flow_graph_compiler.h"
 
 #include "vm/bit_vector.h"
 #include "vm/cha.h"
@@ skipping 61 matching lines @@
     // Use smaller thresholds in precompilation as we are compiling everything
     // with the optimizing compiler instead of only hot functions.
     FLAG_inlining_size_threshold = 5;
     FLAG_inline_getters_setters_smaller_than = 5;
     FLAG_inlining_callee_size_threshold = 20;
     FLAG_inlining_depth_threshold = 2;
     FLAG_inlining_caller_size_threshold = 1000;
     FLAG_inlining_constant_arguments_max_size_threshold = 100;
     FLAG_inlining_constant_arguments_min_size_threshold = 30;
 
+    FLAG_background_compilation = false;
     FLAG_always_megamorphic_calls = true;
     FLAG_collect_dynamic_function_names = true;
     FLAG_fields_may_be_reset = true;
     FLAG_ic_range_profiling = false;
     FLAG_interpret_irregexp = true;
     FLAG_lazy_dispatchers = false;
     FLAG_link_natives_lazily = true;
     FLAG_optimization_counter_threshold = -1;
     FLAG_polymorphic_with_deopt = false;
     FLAG_precompiled_mode = true;
     FLAG_reorder_basic_blocks = false;
     FLAG_use_field_guards = false;
     FLAG_use_cha_deopt = false;
 
 #if !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
     // Set flags affecting runtime accordingly for dart_noopt.
-    FLAG_background_compilation = false;
     FLAG_collect_code = false;
     FLAG_support_debugger = false;
     FLAG_deoptimize_alot = false;  // Used in some tests.
     FLAG_deoptimize_every = 0;     // Used in some tests.
     FLAG_enable_mirrors = false;
     FLAG_load_deferred_eagerly = true;
     FLAG_print_stop_message = false;
     FLAG_use_osr = false;
 #endif
   }
 }
 
 DEFINE_FLAG_HANDLER(PrecompilationModeHandler,
                     precompilation,
                     "Precompilation mode");
 
 #ifdef DART_PRECOMPILED_RUNTIME
 
-COMPILE_ASSERT(!FLAG_background_compilation);
 COMPILE_ASSERT(!FLAG_collect_code);
 COMPILE_ASSERT(!FLAG_deoptimize_alot);  // Used in some tests.
 COMPILE_ASSERT(!FLAG_enable_mirrors);
 COMPILE_ASSERT(FLAG_precompiled_runtime);
 COMPILE_ASSERT(!FLAG_print_stop_message);
 COMPILE_ASSERT(!FLAG_use_osr);
 COMPILE_ASSERT(FLAG_deoptimize_every == 0);  // Used in some tests.
 COMPILE_ASSERT(FLAG_load_deferred_eagerly);
 
 #endif  // DART_PRECOMPILED_RUNTIME
@@ skipping 1838 matching lines @@
 
 
 void FlowGraphCompiler::FrameStateClear() {
   ASSERT(!is_optimizing());
   frame_state_.TruncateTo(0);
 }
 #endif  // defined(DEBUG) && !defined(TARGET_ARCH_DBC)
 
 
 }  // namespace dart