Disable flaky test.

CFIBacktraceAndroidTest.TestFindCFIRow is flaky on Android.

TBR=torne@chromium.org

Bug: 829555
Change-Id: I7cab963e1cde280cbd47ad51bc7d569055d9dfc9
Reviewed-on: https://chromium-review.googlesource.com/1010825Reviewed-by: Maria Khomenko <mariakhomenko@chromium.org>
Commit-Queue: Maria Khomenko <mariakhomenko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#550295}

base/trace_event/cfi_backtrace_android_unittest.cc

@@ -45,7 +45,8 @@ TEST(CFIBacktraceAndroidTest, TestUnwinding) {
   }
 }
 
-TEST(CFIBacktraceAndroidTest, TestFindCFIRow) {
+// Flaky: https://bugs.chromium.org/p/chromium/issues/detail?id=829555
+TEST(CFIBacktraceAndroidTest, DISABLED_TestFindCFIRow) {
   auto* unwinder = CFIBacktraceAndroid::GetInitializedInstance();
   /* Input is generated from the CFI file:
   STACK CFI INIT 1000 500