Work around Clang's new -Wmismatched-new-delete warning.

base/debug/stack_trace_unittest.cc

Index: base/debug/stack_trace_unittest.cc
diff --git a/base/debug/stack_trace_unittest.cc b/base/debug/stack_trace_unittest.cc
index 15c90939a2e7e6c6a0dd81b929e7d587c7d042fa..804587e34055e94b41c7c7c06e9b49c528907973 100644
--- a/base/debug/stack_trace_unittest.cc
+++ b/base/debug/stack_trace_unittest.cc
@@ -135,8 +135,14 @@ TEST_F(StackTraceTest, DebugPrintBacktrace) {
 
 #if defined(OS_POSIX) && !defined(OS_ANDROID)
 #if !defined(OS_IOS)
+static char* newArray() {
+  // Clang warns about the mismatched new[]/delete if they occur in the same
+  // function.
+  return new char[10];
+}
+
 MULTIPROCESS_TEST_MAIN(MismatchedMallocChildProcess) {
-  char* pointer = new char[10];
+  char* pointer = newArray();
   delete pointer;
   return 2;
 }