VM: Fix product precompiler, it must have FLAG_use_osr set to false.

runtime/vm/flag_list.h

 // 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.
 
 #ifndef RUNTIME_VM_FLAG_LIST_H_
 #define RUNTIME_VM_FLAG_LIST_H_
 
 // Don't use USING_DBC outside of this file.
 #if defined(TARGET_ARCH_DBC)
 #define USING_DBC true
 #else
 #define USING_DBC false
 #endif
 
 #if defined(TARGET_OS_FUCHSIA)
 #define USING_FUCHSIA true
 #else
 #define USING_FUCHSIA false
 #endif
 
 // Don't use USING_MULTICORE outside of this file.
 #if defined(ARCH_IS_MULTI_CORE)
 #define USING_MULTICORE true
 #else
 #define USING_MULTICORE false
 #endif
 
+#if defined(DART_PRECOMPILER)
+#define USING_PRECOMPILER true
+#else
+#define USING_PRECOMPILER false
+#endif
+
 // List of all flags in the VM.
 // Flags can be one of three categories:
 // * P roduct flags: Can be set in any of the deployment modes, including in
 //   production.
 // * R elease flags: Generally available flags except when building product.
 // * D ebug flags: Can only be set in debug VMs, which also have C++ assertions
 //   enabled.
 // * pre C ompile flags: Generally available flags except when building product
 //   or precompiled runtime.
 //
@@ skipping 117 matching lines @@
   R(trace_profiler, false, bool, false, "Profiler trace")                      \
   D(trace_profiler_verbose, bool, false, "Verbose profiler trace")             \
   D(trace_ssa_allocator, bool, false, "Trace register allocation over SSA.")   \
   D(trace_zones, bool, false, "Traces allocation sizes in the zone.")          \
   P(truncating_left_shift, bool, true,                                         \
     "Optimize left shift to truncate if possible")                             \
   P(use_cha_deopt, bool, true,                                                 \
     "Use class hierarchy analysis even if it can cause deoptimization.")       \
   P(use_field_guards, bool, !USING_DBC,                                        \
     "Use field guards and track field types")                                  \
-  C(use_osr, false, true, bool, true, "Use OSR")                               \
+  C(use_osr, false, !USING_PRECOMPILER, bool, !USING_PRECOMPILER, "Use OSR")   \
   P(verbose_gc, bool, false, "Enables verbose GC.")                            \
   P(verbose_gc_hdr, int, 40, "Print verbose GC header interval.")              \
   R(verify_after_gc, false, bool, false,                                       \
     "Enables heap verification after GC.")                                     \
   R(verify_before_gc, false, bool, false,                                      \
     "Enables heap verification before GC.")                                    \
   D(verify_gc_contains, bool, false,                                           \
     "Enables verification of address contains during GC.")                     \
   D(verify_on_transition, bool, false, "Verify on dart <==> VM.")
 
 #endif  // RUNTIME_VM_FLAG_LIST_H_