Add exception handler cache to isolate

runtime/vm/isolate.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/isolate.h"
 
 #include "include/dart_api.h"
 #include "include/dart_native_api.h"
 #include "platform/assert.h"
 #include "platform/text_buffer.h"
@@ skipping 827 matching lines @@
       spawn_count_(0),
 #define ISOLATE_METRIC_CONSTRUCTORS(type, variable, name, unit)                \
   metric_##variable##_(),
       ISOLATE_METRIC_LIST(ISOLATE_METRIC_CONSTRUCTORS)
 #undef ISOLATE_METRIC_CONSTRUCTORS
           has_attempted_reload_(false),
       no_reload_scope_depth_(0),
       reload_every_n_stack_overflow_checks_(FLAG_reload_every),
       reload_context_(NULL),
       last_reload_timestamp_(OS::GetCurrentTimeMillis()),
-      should_pause_post_service_request_(false) {
+      should_pause_post_service_request_(false),
+      handler_info_cache_() {
   NOT_IN_PRODUCT(FlagsCopyFrom(api_flags));
   // TODO(asiva): A Thread is not available here, need to figure out
   // how the vm_tag (kEmbedderTagId) can be set, these tags need to
   // move to the OSThread structure.
   set_user_tag(UserTags::kDefaultUserTag);
 }
 
 #undef REUSABLE_HANDLE_SCOPE_INIT
 #undef REUSABLE_HANDLE_INITIALIZERS
 
@@ skipping 2086 matching lines @@
 void IsolateSpawnState::DecrementSpawnCount() {
   ASSERT(spawn_count_monitor_ != NULL);
   ASSERT(spawn_count_ != NULL);
   MonitorLocker ml(spawn_count_monitor_);
   ASSERT(*spawn_count_ > 0);
   *spawn_count_ = *spawn_count_ - 1;
   ml.Notify();
 }
 
 }  // namespace dart