[Chromecast] Disable TimeFormattingTest.TimeFormat* tests.

chromecast/BUILD.gn

Index: chromecast/BUILD.gn
diff --git a/chromecast/BUILD.gn b/chromecast/BUILD.gn
index d89cf1dcca412bf66c832bb332e10349b6320fd3..4ca08a0e29ca098943dcaf78f7a403a47e0a3fe7 100644
--- a/chromecast/BUILD.gn
+++ b/chromecast/BUILD.gn
@@ -137,11 +137,13 @@ cast_test_group("cast_tests") {
       # Disable ProcessUtilTest.* (need to define OS_ANDROID)
       # Disable StackContainer.BufferAlignment (don't support 16-byte alignment)
       # Disable SystemMetrics2Test.GetSystemMemoryInfo (buffers>0 can't be guaranteed)
+      # Disable TimeFormattingTest.TimeFormat* for flakiness on devices (crbug/671429)
       gtest_excludes = [
         "ProcessMetricsTest.GetNumberOfThreads",
         "ProcessUtilTest.*",
         "StackContainer.BufferAlignment",
         "SystemMetrics2Test.GetSystemMemoryInfo",
+        "TimeFormattingTest.TimeFormat*",
       ]
 
       if (is_cast_audio_only) {