Report OOM errors instead of asserting on allocation failures when sending

runtime/vm/snapshot.h

 // 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.
 
 #ifndef VM_SNAPSHOT_H_
 #define VM_SNAPSHOT_H_
 
 #include "platform/assert.h"
 #include "vm/allocation.h"
 #include "vm/bitfield.h"
@@ skipping 448 matching lines @@
   Exceptions::ExceptionType exception_type() const {
     return exception_type_;
   }
   void set_exception_type(Exceptions::ExceptionType type) {
     exception_type_ = type;
   }
   const char* exception_msg() const { return exception_msg_; }
   void set_exception_msg(const char* msg) {
     exception_msg_ = msg;
   }
-  LanguageError* ErrorHandle() { return &error_; }
   void ThrowException(Exceptions::ExceptionType type, const char* msg);
 
  protected:
   class ForwardObjectNode : public ZoneAllocated {
    public:
     ForwardObjectNode(RawObject* raw, uword tags, SerializeState state)
         : raw_(raw), tags_(tags), state_(state) {}
     RawObject* raw() const { return raw_; }
     uword tags() const { return tags_; }
     bool is_serialized() const { return state_ == kIsSerialized; }
@@ skipping 34 matching lines @@
 
   ObjectStore* object_store() const { return object_store_; }
 
  private:
   Snapshot::Kind kind_;
   ObjectStore* object_store_;  // Object store for common classes.
   ClassTable* class_table_;  // Class table for the class index to class lookup.
   GrowableArray<ForwardObjectNode*> forward_list_;
   Exceptions::ExceptionType exception_type_;  // Exception type.
   const char* exception_msg_;  // Message associated with exception.
-  LanguageError& error_;  // Error handle.
 
   friend class RawArray;
   friend class RawClass;
   friend class RawClosureData;
   friend class RawGrowableObjectArray;
   friend class RawImmutableArray;
   friend class RawJSRegExp;
   friend class RawLibrary;
   friend class RawLiteralToken;
   friend class RawScript;
@@ skipping 77 matching lines @@
  private:
   SnapshotWriter* writer_;
   bool as_references_;
 
   DISALLOW_COPY_AND_ASSIGN(SnapshotWriterVisitor);
 };
 
 }  // namespace dart
 
 #endif  // VM_SNAPSHOT_H_