[Telemetry] Improve unittest cycle time and fix testIFrame.

content/test/gpu/gpu_tests/memory.py

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 import memory_expectations
 import page_sets
 
 from telemetry import benchmark
 from telemetry.page import page_test
 from telemetry.timeline import counter
 from telemetry.timeline import model
 
 MEMORY_LIMIT_MB = 192
 SINGLE_TAB_LIMIT_MB = 192
-WIGGLE_ROOM_MB = 8
+WIGGLE_ROOM_MB = 12
 
 test_harness_script = r"""
   var domAutomationController = {};
   domAutomationController._finished = false;
 
   domAutomationController.send = function(msg) {
     // This should wait until all effects of memory management complete.
     // We will need to wait until all
     // 1. pending commits from the main thread to the impl thread in the
     //    compositor complete (for visible compositors).
@@ skipping 73 matching lines @@
   page_set = page_sets.MemoryTestsPageSet
 
   def CreateExpectations(self, page_set):
     return memory_expectations.MemoryExpectations()
 
   def CreatePageSet(self, options):
     page_set = super(Memory, self).CreatePageSet(options)
     for page in page_set.pages:
       page.script_to_evaluate_on_commit = test_harness_script
     return page_set