Reenabled page_cycler and polymer_load benchmarks disabled due to crash.

These benchmarks were crashing as a result of a style-related ASSERT. The
offending CLs have been reverted (see bug) so I'm reenabling these.

BUG=470071
TBR=rune@opera.com

Review URL: https://codereview.chromium.org/1030183002

Cr-Commit-Position: refs/heads/master@{#322152}

tools/perf/benchmarks/page_cycler.py

@@ -70,7 +70,6 @@ class PageCyclerIntlEsFrPtBr(_PageCycler):
     return 'page_cycler.intl_es_fr_pt-BR'
 
 
-@benchmark.Disabled('win', 'mac', 'linux')  # crbug.com/470071
 class PageCyclerIntlHiRu(_PageCycler):
   """Page load time benchmark for a variety of pages in Hindi and Russian.
 
@@ -199,8 +198,7 @@ class PageCyclerToughLayoutCases(_PageCycler):
 
 
 # crbug.com/273986: This test is flakey on Windows.
-# crbug.com/470071: This test is failing on N10
-@benchmark.Disabled('win', 'android')
+@benchmark.Disabled('win')
 class PageCyclerTypical25(_PageCycler):
   """Page load time benchmark for a 25 typical web pages.
 

tools/perf/benchmarks/polymer_load.py

@@ -7,9 +7,7 @@ import page_sets
 from telemetry import benchmark
 
 
-# Failing on N4, crbug.com/470071
-#@benchmark.Enabled('android')
-@benchmark.Disabled
+@benchmark.Enabled('android')
 class PolymerLoadPica(benchmark.Benchmark):
   """Measures time to polymer-ready for Pica (News Reader)."""
   test = polymer_load.PolymerLoadMeasurement