Revert "Hide Isolate pointer from embedder"

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 "platform/assert.h"
 #include "platform/json.h"
 #include "vm/code_observers.h"
@@ skipping 1650 matching lines @@
     // Not tracking deoptimized code.
     return;
   }
   // TODO(johnmccutchan): Scan this array and the isolate's profile before
   // old space GC and remove the keep_code flag.
   deoptimized_code.Add(code);
 }
 
 
 void Isolate::WakePauseEventHandler(Dart_Isolate isolate) {
-  Isolate* iso = FindIsolateInList(isolate);
-  ASSERT(iso != NULL);
+  Isolate* iso = reinterpret_cast<Isolate*>(isolate);
   MonitorLocker ml(iso->pause_loop_monitor_);
   ml.Notify();
 }
 
 
 void Isolate::PauseEventHandler() {
   // We are stealing a pause event (like a breakpoint) from the
   // embedder.  We don't know what kind of thread we are on -- it
   // could be from our thread pool or it could be a thread from the
   // embedder.  Sit on the current thread handling service events
@@ skipping 48 matching lines @@
   intptr_t count = 0;
   Isolate* current = isolates_list_head_;
   while (current != NULL) {
     count++;
     current = current->next_;
   }
   return count;
 }
 
 
-Isolate* Isolate::FindIsolateInList(Dart_Isolate isolate) {
-  MonitorLocker ml(isolates_list_monitor_);
-  Isolate* current = isolates_list_head_;
-  while (current != NULL) {
-    if (Api::CastIsolate(current) == isolate) {
-      // We've found the isolate.
-      return current;
-    }
-    current = current->next_;
-  }
-  return NULL;
-}
-
-
 void Isolate::AddIsolateTolist(Isolate* isolate) {
   MonitorLocker ml(isolates_list_monitor_);
   ASSERT(isolate != NULL);
   ASSERT(isolate->next_ == NULL);
   isolate->next_ = isolates_list_head_;
   isolates_list_head_ = isolate;
 }
 
 
 void Isolate::RemoveIsolateFromList(Isolate* isolate) {
@@ skipping 219 matching lines @@
                            serialized_message_, serialized_message_len_);
 }
 
 
 void IsolateSpawnState::Cleanup() {
   SwitchIsolateScope switch_scope(I);
   Dart::ShutdownIsolate();
 }
 
 }  // namespace dart