Fix libdl dependency on Android and remove librt hack.

src/base/platform/condition-variable.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/base/platform/condition-variable.h"
 
 #include <errno.h>
 #include <time.h>
 
 #include "src/base/platform/time.h"
 
 namespace v8 {
 namespace base {
 
 #if V8_OS_POSIX
 
 ConditionVariable::ConditionVariable() {
-  // TODO(bmeurer): The test for V8_LIBRT_NOT_AVAILABLE is a temporary
-  // hack to support cross-compiling Chrome for Android in AOSP. Remove
-  // this once AOSP is fixed.
 #if (V8_OS_FREEBSD || V8_OS_NETBSD || V8_OS_OPENBSD || \
-     (V8_OS_LINUX && V8_LIBC_GLIBC)) && !V8_LIBRT_NOT_AVAILABLE
+     (V8_OS_LINUX && V8_LIBC_GLIBC))
   // On Free/Net/OpenBSD and Linux with glibc we can change the time
   // source for pthread_cond_timedwait() to use the monotonic clock.
   pthread_condattr_t attr;
   int result = pthread_condattr_init(&attr);
   DCHECK_EQ(0, result);
   result = pthread_condattr_setclock(&attr, CLOCK_MONOTONIC);
   DCHECK_EQ(0, result);
   result = pthread_cond_init(&native_handle_, &attr);
   DCHECK_EQ(0, result);
   result = pthread_condattr_destroy(&attr);
@@ skipping 41 matching lines @@
   mutex->AssertHeldAndUnmark();
 #if V8_OS_MACOSX
   // Mac OS X provides pthread_cond_timedwait_relative_np(), which does
   // not depend on the real time clock, which is what you really WANT here!
   ts = rel_time.ToTimespec();
   DCHECK_GE(ts.tv_sec, 0);
   DCHECK_GE(ts.tv_nsec, 0);
   result = pthread_cond_timedwait_relative_np(
       &native_handle_, &mutex->native_handle(), &ts);
 #else
-  // TODO(bmeurer): The test for V8_LIBRT_NOT_AVAILABLE is a temporary
-  // hack to support cross-compiling Chrome for Android in AOSP. Remove
-  // this once AOSP is fixed.
 #if (V8_OS_FREEBSD || V8_OS_NETBSD || V8_OS_OPENBSD || \
-     (V8_OS_LINUX && V8_LIBC_GLIBC)) && !V8_LIBRT_NOT_AVAILABLE
+     (V8_OS_LINUX && V8_LIBC_GLIBC))
   // On Free/Net/OpenBSD and Linux with glibc we can change the time
   // source for pthread_cond_timedwait() to use the monotonic clock.
   result = clock_gettime(CLOCK_MONOTONIC, &ts);
   DCHECK_EQ(0, result);
   Time now = Time::FromTimespec(ts);
 #else
   // The timeout argument to pthread_cond_timedwait() is in absolute time.
   Time now = Time::NowFromSystemTime();
 #endif
   Time end_time = now + rel_time;
@@ skipping 214 matching lines @@
   // Release the wait event.
   DCHECK(!result || event->notified_);
   native_handle_.Post(event, result);
 
   return result;
 }
 
 #endif  // V8_OS_POSIX
 
 } }  // namespace v8::base