Fix Win64 compilation after r14670

src/profile-generator.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 900 matching lines @@
     Address start;
     CodeEntry* pc_entry = code_map_.FindEntry(sample.pc, &start);
     // If pc is in the function code before it set up stack frame or after the
     // frame was destroyed SafeStackTraceFrameIterator incorrectly thinks that
     // ebp contains return address of the current function and skips caller's
     // frame. Check for this case and just skip such samples.
     if (pc_entry) {
       List<OffsetRange>* ranges = pc_entry->no_frame_ranges();
       if (ranges) {
         Code* code = Code::cast(HeapObject::FromAddress(start));
-        int pc_offset = sample.pc - code->instruction_start();
+        int pc_offset = static_cast<int>(sample.pc - code->instruction_start());
         for (int i = 0; i < ranges->length(); i++) {
           OffsetRange& range = ranges->at(i);
           if (range.from <= pc_offset && pc_offset < range.to) {
             return;
           }
         }
       }
     }
     *entry++ = pc_entry;
 
@@ skipping 25 matching lines @@
     if (no_symbolized_entries) {
       *entry++ = EntryForVMState(sample.state);
     }
   }
 
   profiles_->AddPathToCurrentProfiles(entries);
 }
 
 
 } }  // namespace v8::internal