Prepare for -Wall for third-party code, -Wextra for chromium_code

third_party/android_crazy_linker/src/src/crazy_linker_leb128.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CRAZY_LINKER_LEB128_H
 #define CRAZY_LINKER_LEB128_H
 
 #include <assert.h>
 #include <stdint.h>
 
 // Helper classes for decoding LEB128, used in packed relocation data.
 // http://en.wikipedia.org/wiki/LEB128
 
 namespace crazy {
 
 class Sleb128Decoder {
  public:
-  Sleb128Decoder(const uint8_t* buffer, size_t count)
-      : current_(buffer), end_(buffer + count) { }
+  Sleb128Decoder(const uint8_t* buffer, size_t count) : current_(buffer)
+#ifndef NDEBUG
+      , end_(buffer + count)
+#endif
+  {}
 
   size_t pop_front() {
     size_t value = 0;
     static const size_t size = CHAR_BIT * sizeof(value);
 
     size_t shift = 0;
     uint8_t byte;
 
     do {
       assert(current_ < end_);
 
       byte = *current_++;
       value |= (static_cast<size_t>(byte & 127) << shift);
       shift += 7;
     } while (byte & 128);
 
     if (shift < size && (byte & 64)) {
       value |= -(static_cast<size_t>(1) << shift);
     }
 
     return value;
   }
 
  private:
   const uint8_t* current_;
+#ifndef NDEBUG
   const uint8_t* const end_;
+#endif
 };
 
 }  // namespace crazy
 
 #endif  // CRAZY_LINKER_LEB128_H