Use isfinite() on all POSIX platforms

base/float_util.h

Index: base/float_util.h
diff --git a/base/float_util.h b/base/float_util.h
index 39b92028ee8d9903b9a5f37a88a9c9093d5231c9..31a307dbf5cc762ce8c7c7b07dfbbf82337613e1 100644
--- a/base/float_util.h
+++ b/base/float_util.h
@@ -10,19 +10,14 @@
 #include <float.h>
 #include <math.h>
 
-#if defined(OS_SOLARIS)
-#include <ieeefp.h>
-#endif
-
 namespace base {
 
 inline bool IsFinite(const double& number) {
-#if defined(OS_MACOSX)
-  // C99 says isfinite() replaced finite(), and iOS does not provide the
-  // older call.
-  return isfinite(number) != 0;
-#elif defined(OS_POSIX)
+#if defined(OS_ANDROID)
+  // isfinite isn't available on Android: http://b.android.com/34793
   return finite(number) != 0;
+#elif defined(OS_POSIX)
+  return isfinite(number) != 0;
 #elif defined(OS_WIN)
   return _finite(number) != 0;
 #endif