Disable invalid assertion in GetSystemMemoryInfo test on iOS.

base/process/process_metrics_unittest.cc

Index: base/process/process_metrics_unittest.cc
diff --git a/base/process/process_metrics_unittest.cc b/base/process/process_metrics_unittest.cc
index ed980209c4a36d0bfa04749532d55a8428216ce5..8abdb26407521888f9b1b30b5bba4243b7746429 100644
--- a/base/process/process_metrics_unittest.cc
+++ b/base/process/process_metrics_unittest.cc
@@ -418,7 +418,8 @@ TEST(SystemMetrics2Test, GetSystemMemoryInfo) {
 #endif  // defined(OS_LINUX) || defined(OS_ANDROID)
 
   // All the values should be less than the total amount of memory.
-#if !defined(OS_WIN)
+#if !defined(OS_WIN) && !defined(OS_IOS)
+  // TODO(crbug.com/711450): re-enable the following assertion on iOS.
   EXPECT_LT(info.free, info.total);
 #endif
 #if defined(OS_LINUX) || defined(OS_ANDROID)