Remove invalid assertion in store buffer code.

runtime/vm/store_buffer.cc

 // 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.
 
 #include "vm/store_buffer.h"
 
 #include "platform/assert.h"
 #include "vm/lockers.h"
 #include "vm/runtime_entry.h"
 
@@ skipping 86 matching lines @@
 
 
 void StoreBuffer::PushBlock(Block* block, ThresholdPolicy policy) {
   BlockStack<Block::kSize>::PushBlockImpl(block);
   if ((policy == kCheckThreshold) && Overflowed()) {
     MutexLocker ml(mutex_);
     Thread* thread = Thread::Current();
     // Sanity check: it makes no sense to schedule the GC in another isolate.
     // (If Isolate ever gets multiple store buffers, we should avoid this
     // coupling by passing in an explicit callback+parameter at construction.)
-    ASSERT(thread->isolate()->mutator_thread() == thread);
     ASSERT(thread->isolate()->store_buffer() == this);
     thread->ScheduleInterrupts(Thread::kVMInterrupt);
   }
 }
 
 
 template<int BlockSize>
 typename BlockStack<BlockSize>::Block*
 BlockStack<BlockSize>::PopNonFullBlock() {
   {
@@ skipping 87 matching lines @@
   while (global_empty_->length() > kMaxGlobalEmpty) {
     delete global_empty_->Pop();
   }
 }
 
 
 template class BlockStack<kStoreBufferBlockSize>;
 template class BlockStack<kMarkingStackBlockSize>;
 
 }  // namespace dart