Get rid of deprecated methods accessing mutator_thread_ instead of current thread

runtime/vm/exceptions.cc

 // Copyright (c) 2011, 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/exceptions.h"
 
 #include "platform/address_sanitizer.h"
 
 #include "vm/dart_api_impl.h"
 #include "vm/dart_entry.h"
@@ skipping 484 matching lines @@
 void Exceptions::ReThrow(Thread* thread,
                          const Instance& exception,
                          const Instance& stacktrace) {
   // Null object is a valid exception object.
   ThrowExceptionHelper(thread, exception, stacktrace, true);
 }
 
 
 void Exceptions::PropagateError(const Error& error) {
   Thread* thread = Thread::Current();
-  Isolate* isolate = thread->isolate();
   Zone* zone = thread->zone();
-  ASSERT(isolate->top_exit_frame_info() != 0);
+  ASSERT(thread->top_exit_frame_info() != 0);
   if (error.IsUnhandledException()) {
     // If the error object represents an unhandled exception, then
     // rethrow the exception in the normal fashion.
     const UnhandledException& uhe = UnhandledException::Cast(error);
     const Instance& exc = Instance::Handle(zone, uhe.exception());
     const Instance& stk = Instance::Handle(zone, uhe.stacktrace());
     Exceptions::ReThrow(thread, exc, stk);
   } else {
     // Return to the invocation stub and return this error object.  The
     // C++ code which invoked this dart sequence can check and do the
@@ skipping 158 matching lines @@
 
 // Throw JavascriptCompatibilityError exception.
 void Exceptions::ThrowJavascriptCompatibilityError(const char* msg) {
   const Array& exc_args = Array::Handle(Array::New(1));
   const String& msg_str = String::Handle(String::New(msg));
   exc_args.SetAt(0, msg_str);
   Exceptions::ThrowByType(Exceptions::kJavascriptCompatibilityError, exc_args);
 }
 
 }  // namespace dart