Workaround ARM tracing issues for non-component builds.

base/third_party/symbolize/symbolize.h

 // 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
@@ skipping 120 matching lines @@
 // returns -1.  |out_file_name_size| is the size of the file name buffer
 // (including the null-terminator).
 typedef int (*SymbolizeOpenObjectFileCallback)(uint64_t pc,
                                                uint64_t &start_address,
                                                uint64_t &base_address,
                                                char *out_file_name,
                                                int out_file_name_size);
 void InstallSymbolizeOpenObjectFileCallback(
     SymbolizeOpenObjectFileCallback callback);
 
+// Parsed /proc/maps entry; used by FindMappedRegion() below.
+struct MappedRegion {
+  uint64_t start_address;
+  uint64_t end_address;
+  const char* flags;
+  uint64_t file_offset;
+  const char* name;
+};
+
+// Iteratively parses /proc/self/maps and calls |callback| for each entry
+// until it returns 'true'.
+// Returns 'true' itself only if iteration was stopped by the callback.
+// The function is async-signal-safe.
+bool FindMappedRegion(
+    void* callback_data,
+    bool (*callback)(void* data, const MappedRegion& region));
+
 _END_GOOGLE_NAMESPACE_
 
 #endif
 
 _START_GOOGLE_NAMESPACE_
 
 // Symbolizes a program counter.  On success, returns true and write the
 // symbol name to "out".  The symbol name is demangled if possible
 // (supports symbols generated by GCC 3.x or newer).  Otherwise,
 // returns false.
 bool Symbolize(void *pc, char *out, int out_size);
 
 _END_GOOGLE_NAMESPACE_
 
 #endif  // BASE_SYMBOLIZE_H_