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diff --git a/src/google_breakpad/processor/symbol_supplier.h b/src/google_breakpad/processor/symbol_supplier.h
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+// Copyright (c) 2006, Google Inc.
+// 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 with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// The caller may implement the SymbolSupplier abstract base class
+// to provide symbols for a given module.
+
+#ifndef GOOGLE_BREAKPAD_PROCESSOR_SYMBOL_SUPPLIER_H__
+#define GOOGLE_BREAKPAD_PROCESSOR_SYMBOL_SUPPLIER_H__
+
+#include <string>
+
+namespace google_breakpad {
+
+using std::string;
+class CodeModule;
+class SystemInfo;
+
+class SymbolSupplier {
+ public:
+  // Result type for GetSymbolFile
+  enum SymbolResult {
+    // no symbols were found, but continue processing
+    NOT_FOUND,
+
+    // symbols were found, and the path has been placed in symbol_file
+    FOUND,
+
+    // stops processing the minidump immediately
+    INTERRUPT,
+  };
+
+  virtual ~SymbolSupplier() {}
+
+  // Retrieves the symbol file for the given CodeModule, placing the
+  // path in symbol_file if successful.  system_info contains strings
+  // identifying the operating system and CPU; SymbolSupplier may use to help
+  // locate the symbol file.  system_info may be NULL or its fields may be
+  // empty if these values are unknown.
+  virtual SymbolResult GetSymbolFile(const CodeModule *module,
+                                     const SystemInfo *system_info,
+                                     string *symbol_file) = 0;
+};
+
+}  // namespace google_breakpad
+
+#endif  // GOOGLE_BREAKPAD_PROCESSOR_SYMBOL_SUPPLIER_H__