Adds TCMalloc support for Android.

third_party/tcmalloc/chromium/src/profiler.cc

 // Copyright (c) 2005, 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 32 matching lines @@
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>  // for getpid()
 #endif
 #if defined(HAVE_SYS_UCONTEXT_H)
 #include <sys/ucontext.h>
 #elif defined(HAVE_UCONTEXT_H)
 #include <ucontext.h>
 #elif defined(HAVE_CYGWIN_SIGNAL_H)
 #include <cygwin/signal.h>
 typedef ucontext ucontext_t;
+#elif defined(__ANDROID__)
+// Do not define ucontext_t here.
 #else
 typedef int ucontext_t;   // just to quiet the compiler, mostly
 #endif
 #include <sys/time.h>
 #include <string>
 #include <gperftools/profiler.h>
 #include <gperftools/stacktrace.h>
 #include "base/commandlineflags.h"
 #include "base/logging.h"
 #include "base/googleinit.h"
@@ skipping 270 matching lines @@
 extern "C" void ProfilerStop() { }
 extern "C" void ProfilerGetCurrentState(ProfilerState* state) {
   memset(state, 0, sizeof(*state));
 }
 
 #endif  // OS_CYGWIN
 
 // DEPRECATED routines
 extern "C" PERFTOOLS_DLL_DECL void ProfilerEnable() { }
 extern "C" PERFTOOLS_DLL_DECL void ProfilerDisable() { }