Disable RangeHistoryWebUITest.allView on Mac due to timeout.

chrome/test/data/webui/history_browsertest.js

Index: chrome/test/data/webui/history_browsertest.js
diff --git a/chrome/test/data/webui/history_browsertest.js b/chrome/test/data/webui/history_browsertest.js
index 5913041c001c628703c2e651733f7ed51ad6b65a..40aec469d0053fd9fc8b3e0f67f5b627a205e6b6 100644
--- a/chrome/test/data/webui/history_browsertest.js
+++ b/chrome/test/data/webui/history_browsertest.js
@@ -665,7 +665,15 @@ RangeHistoryWebUITest.prototype = {
   },
 };
 
-TEST_F('RangeHistoryWebUITest', 'allView', function() {
+/**
+ * Disabled due to timeout on Mac http://crbug.com/377338
+ */
+GEN('#if defined(OS_MACOSX)');
+GEN('#define MAYBE_allView DISABLED_allView');
+GEN('#else');
+GEN('#define MAYBE_allView allView');
+GEN('#endif');
+TEST_F('RangeHistoryWebUITest', 'MAYBE_allView', function() {
   // Check that we start off in the all time view.
   expectTrue($('timeframe-filter-all').checked);
   // See if the correct number of days is shown.