Disabled a few more failing perf tests

ios/chrome/browser/ui/stack_view/stack_view_controller_perftest.mm

 // Copyright 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 <UIKit/UIKit.h>
 
 #include "base/callback_helpers.h"
 #import "base/mac/bind_objc_block.h"
 #include "base/mac/foundation_util.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 338 matching lines @@
 
 base::TimeDelta StackViewControllerPerfTest::TakeSnapshot() {
   base::Time startTime = base::Time::NowFromSystemTime();
   UIImage* image = [[tab_model_ currentTab] updateSnapshotWithOverlay:YES
                                                      visibleFrameOnly:YES];
   base::TimeDelta elapsed = base::Time::NowFromSystemTime() - startTime;
   EXPECT_TRUE(image);
   return elapsed;
 }
 
-TEST_F(StackViewControllerPerfTest, WebView_Shapshot) {
+// TODO(crbug.com/717314): Failed DCHECK in PerfTestWithBVC::SetUp().
+TEST_F(StackViewControllerPerfTest, DISABLED_WebView_Shapshot) {
   // Opening a StackViewController is done only on iPhones, not on iPads.
   // This test is meaningless on an iPad.
   if (IsIPadIdiom())
     return;
   const int kNumTests = 10;
   base::TimeDelta times[kNumTests];
   CreateTabs(1, false);
   for (int i = 0; i < kNumTests; i++) {
     times[i] = TakeSnapshot();
     LoadNextURL();
@@ skipping 31 matching lines @@
       CalculateAverage(close_times + 1, kNumTests - 1, NULL, &max_close);
   LogPerfTiming("Open cold", open_times[0]);
   LogPerfTiming("Open warm avg", open_avg);
   LogPerfTiming("Open warm max", max_open);
   LogPerfTiming("Close cold", close_times[0]);
   LogPerfTiming("Close cold avg", close_avg);
   LogPerfTiming("Close cold max", max_close);
 }
 
 }  // anonymous namespace