Minor cleanup based on profiler output of CompileParseFunction.

runtime/vm/profiler_service.cc

 // Copyright (c) 2015, 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/profiler_service.h"
 
 #include "vm/growable_array.h"
 #include "vm/hash_map.h"
 #include "vm/log.h"
 #include "vm/native_symbol.h"
@@ skipping 2526 matching lines @@
   }
   if (code_trie_) {
     return NULL;
   }
   ProfileFunction* func = profile_->GetFunction(current_->table_index());
   const Function& function = *(func->function());
   if (function.IsNull()) {
     // No function.
     return NULL;
   }
-  const Script& script = Script::Handle(function.script());
+  Zone* zone = Thread::Current()->zone();
+  const Script& script = Script::Handle(zone, function.script());
   if (script.IsNull()) {
     // No script.
     return NULL;
   }
-  const TokenStream& token_stream = TokenStream::Handle(script.tokens());
+  const TokenStream& token_stream = TokenStream::Handle(zone, script.tokens());
   if (token_stream.IsNull()) {
     // No token position.
     return NULL;
   }
   ProfileFunctionSourcePosition pfsp(TokenPosition::kNoSource);
   if (!func->GetSinglePosition(&pfsp)) {
     // Not exactly one source position.
     return NULL;
   }
   TokenPosition token_pos = pfsp.token_pos();
   if (!token_pos.IsReal() && !token_pos.IsSynthetic()) {
     // Not a location in a script.
     return NULL;
   }
   if (token_pos.IsSynthetic()) {
     token_pos = token_pos.FromSynthetic();
   }
-  TokenStream::Iterator iterator(token_stream, token_pos);
-  const String& str = String::Handle(iterator.CurrentLiteral());
+  TokenStream::Iterator iterator(zone, token_stream, token_pos);
+  const String& str = String::Handle(zone, iterator.CurrentLiteral());
   if (str.IsNull()) {
     return NULL;
   }
   return str.ToCString();
 }
 
 bool ProfileTrieWalker::Down() {
   if ((current_ == NULL) || (current_->NumChildren() == 0)) {
     return false;
   }
@@ skipping 163 matching lines @@
   // Disable thread interrupts while processing the buffer.
   DisableThreadInterruptsScope dtis(thread);
 
   ClearProfileVisitor clear_profile(isolate);
   sample_buffer->VisitSamples(&clear_profile);
 }
 
 #endif  // !PRODUCT
 
 }  // namespace dart