Disable page_cycler_v2 on N6 webview

tools/perf/benchmarks/page_cycler_v2.py

Index: tools/perf/benchmarks/page_cycler_v2.py
diff --git a/tools/perf/benchmarks/page_cycler_v2.py b/tools/perf/benchmarks/page_cycler_v2.py
index 68b8e27a3cda2dc72fde3be6d4f8336f3f08c104..2c3fa69e42333ed7785004c7c159f91b578694bb 100644
--- a/tools/perf/benchmarks/page_cycler_v2.py
+++ b/tools/perf/benchmarks/page_cycler_v2.py
@@ -55,6 +55,12 @@ class _PageCyclerV2(perf_benchmark.PerfBenchmark):
         possible_browser.platform.GetDeviceTypeName() == 'Nexus 5X' or
         possible_browser.platform.GetDeviceTypeName() == 'AOSP on BullHead'):
       return True
+
+    # crbug.com/651188
+    if (possible_browser.platform.GetDeviceTypeName() == 'Nexus 6' and
+        possible_browser.browser_type == 'android-webview'):
+      return True
+
     return False