third_party/zlib/mozzconf.h defines Byte as MOZ_Z_Byte and because of this including jni-code (<jni.h>) causes a compilation error (because the word Byte used in jni.h is replaced with MOZ_Z_Byte).


Example compilation error when including <jni.h> in base/message_loop/message_loop.h:


In file included from ../../base/message_loop/message_loop.h:41:0,
                 from ../../third_party/zlib/google/zip_reader.cc:13:
../../third_party/android_tools/ndk/platforms/android-16/arch-arm/usr/include/jni.h: In member function 'jbyte _JNIEnv::CallMOZ_Z_ByteMethod(jobject, jmethodID, ...)':
../../third_party/android_tools/ndk/platforms/android-16/arch-arm/usr/include/jni.h:638:5: error: 'const struct JNINativeInterface' has no member named 'CallMOZ_Z_ByteMethodV'
     CALL_TYPE(jbyte, Byte)
     ^


(this is something I tried to do locally, and I've now worked around it. But it still seems bad to rename something as generic as the word "Byte" :/).