ios_net_unittests (iPhone 5 iOS 9.0) failing on chromium.mac/ios-simulator

Builders failed on: 
- ios-simulator: 
  https://build.chromium.org/p/chromium.mac/builders/ios-simulator

It started with a CL that introduced unused functions so it's likely 
a failing bot. Trooper bug here: crbug.com/713594

Regression ranges in case it's not the bot:
9aba1eec (ksakamoto): Add assert descriptions to fontfaceset-check-platform-fonts.html
6c419327 (dmazzoni): Re-land: Finish implementation of automation API hit testing for the desktop
4abf1edc (rhalavati): Typos corrected in network traffic annotation texts.
eb81522b (tzik): Rewrite base::Bind to base::BindOnce with base_bind_rewriters in //chrome/browser/printing
c25d22f9 (gambard): [ObjC ARC] Converts ios/public/provider/chrome/browser/images:test_support to ARC.
ee4ca852 (gambard): [ObjC ARC] Converts ios/public/provider/chrome/browser/omaha:test_support to ARC.
15bf5d60 (gambard): [ObjC ARC] Converts ios/public/provider/chrome/browser/distribution:distribution to ARC.
2b68896e (gambard): [ObjC ARC] Converts ios/public/provider/chrome/browser/omaha:omaha to ARC.
a33bf9e1 (gambard): [ObjC ARC] Converts ios/public/provider/chrome/browser/images:images to ARC.
68532f4b (gambard): [ObjC ARC] Converts ios/public/provider/chrome/browser/distribution:test_support to ARC.
70992626 (gambard): [ObjC ARC] Converts ios/chrome/browser/ui/alert_coordinator:alert_coordinator_internal to ARC.
1a802b27 (tansell): webkit-layout-tests: Revert accidental addition of duplicate virtual tests
7185f26b (nainar): Generate getters/setters for some fields on groups in ComputedStyle