GTTF: Enable glibcxx debug mode for Debug builds by default.

chrome/browser/safe_browsing/prefix_set_unittest.cc

Index: chrome/browser/safe_browsing/prefix_set_unittest.cc
diff --git a/chrome/browser/safe_browsing/prefix_set_unittest.cc b/chrome/browser/safe_browsing/prefix_set_unittest.cc
index 7f78a6af975081f161705f7607be6cc938f91bd4..448be08d1a862acef9e71c6c609bbdd082378c7e 100644
--- a/chrome/browser/safe_browsing/prefix_set_unittest.cc
+++ b/chrome/browser/safe_browsing/prefix_set_unittest.cc
@@ -30,7 +30,7 @@ class PrefixSetTest : public PlatformTest {
   // Generate a set of random prefixes to share between tests.  For
   // most tests this generation was a large fraction of the test time.
   static void SetUpTestCase() {
-    for (size_t i = 0; i < 50000; ++i) {
+    for (size_t i = 0; i < 5000; ++i) {
       const SBPrefix prefix = static_cast<SBPrefix>(base::RandUint64());
       shared_prefixes_.push_back(prefix);
     }