Put store buffer verification behind a flag.

R=erik.corry@gmail.com

Review URL: http://codereview.chromium.org/8261008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9609 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/store-buffer.cc

@@ -390,11 +390,13 @@ void StoreBuffer::VerifyPointers(LargeObjectSpace* space) {
 
 void StoreBuffer::Verify() {
 #ifdef DEBUG
+  if (FLAG_enable_slow_asserts || FLAG_verify_heap) {
     VerifyPointers(heap_->old_pointer_space(),
                    &StoreBuffer::FindPointersToNewSpaceInRegion);
     VerifyPointers(heap_->map_space(),
                    &StoreBuffer::FindPointersToNewSpaceInMapsRegion);
     VerifyPointers(heap_->lo_space());
+  }
 #endif
 }