Fix test/build failures (win64 compile warning, isolate test parallel compilation failure, gcmole i…

src/hydrogen.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1842 matching lines @@
   }
 }
 
 
 HValue* HGraphBuilder::JSArrayBuilder::EmitMapCode(HValue* context) {
   // Get the global context, the native context, the map array
   HInstruction* global_object = AddInstruction(new(zone())
       HGlobalObject(context));
   HInstruction* native_context = AddInstruction(new(zone())
       HLoadNamedField(global_object, true, GlobalObject::kNativeContextOffset));
-  size_t offset = Context::kHeaderSize +
+  int offset = Context::kHeaderSize +
       kPointerSize * Context::JS_ARRAY_MAPS_INDEX;
   HInstruction* map_array = AddInstruction(new(zone())
       HLoadNamedField(native_context, true, offset));
   offset = kind_ * kPointerSize + FixedArrayBase::kHeaderSize;
   return AddInstruction(new(zone()) HLoadNamedField(map_array, true, offset));
 }
 
 
 HValue* HGraphBuilder::JSArrayBuilder::EstablishAllocationSize(
     HValue* length_node) {
@@ skipping 10269 matching lines @@
     }
   }
 
 #ifdef DEBUG
   if (graph_ != NULL) graph_->Verify(false);  // No full verify.
   if (allocator_ != NULL) allocator_->Verify();
 #endif
 }
 
 } }  // namespace v8::internal