build/build_config.h - platform/external/pdfium - Git at Google

 #define OS_POSIX
 #define OS_ANDROID
 #define USE_SYSTEM_ICUUC
 #define USE_SYSTEM_LIBJPEG
 #define USE_SYSTEM_ZLIB
 // Makes base/logging.h and base/bits.h work.
 #define COMPILER_GCC
	#define OS_POSIX
	#define OS_ANDROID
	#define USE_SYSTEM_ICUUC
	#define USE_SYSTEM_LIBJPEG
	#define USE_SYSTEM_ZLIB
	// Makes base/logging.h and base/bits.h work.
	#define COMPILER_GCC