Address Siva's DBCs on https://codereview.chromium.org/2350633003/

runtime/vm/dart_api_impl.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 "include/dart_api.h"
 #include "include/dart_mirrors_api.h"
 #include "include/dart_native_api.h"
 
 #include "platform/assert.h"
 #include "lib/stacktrace.h"
@@ skipping 1468 matching lines @@
   if (!::Dart_IsUnhandledExceptionError(error) && !::Dart_IsNull(error)) {
     FATAL1("%s expects the error to be an unhandled exception error or null.",
             CURRENT_FUNC);
   }
   isolate->SetStickyError(
       Api::UnwrapErrorHandle(Z, error).raw());
 }
 
 
 DART_EXPORT bool Dart_HasStickyError() {
-  Isolate* isolate = Isolate::Current();
+  Thread* T = Thread::Current();
+  Isolate* isolate = T->isolate();
   CHECK_ISOLATE(isolate);
   NoSafepointScope no_safepoint_scope;
   return isolate->sticky_error() != Error::null();
 }
 
 
 DART_EXPORT Dart_Handle Dart_GetStickyError() {
-  Isolate* I = Isolate::Current();
+  Thread* T = Thread::Current();
+  Isolate* I = T->isolate();
   CHECK_ISOLATE(I);
   NoSafepointScope no_safepoint_scope;
-  if (I->sticky_error() != Object::null()) {
+  if (I->sticky_error() != Error::null()) {
     Dart_Handle error =
-        Api::NewHandle(Thread::Current(), I->sticky_error());
+        Api::NewHandle(T, I->sticky_error());
     return error;
   }
   return Dart_Null();
 }
 
 
 DART_EXPORT void Dart_ExitIsolate() {
   Thread* T = Thread::Current();
   CHECK_ISOLATE(T->isolate());
   // The Thread structure is disassociated from the isolate, we do the
@@ skipping 5106 matching lines @@
 
 DART_EXPORT bool Dart_IsPrecompiledRuntime() {
 #if defined(DART_PRECOMPILED_RUNTIME)
   return true;
 #else
   return false;
 #endif
 }
 
 }  // namespace dart