UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2979.0 Safari/537.36

Example URL:
https://mail.google.com/mail/u/0/#inbox

Steps to reproduce the problem:
1. open https://mail.google.com/mail/u/0/#inbox
2. wait a few minutes while browsing another tab

What is the expected behavior?
for the tab to remain working

What went wrong?
seems to die
getting a Aw snap
https://support.google.com/chrome/answer/95669?visit_id=1-636199207953770350-3668491551&p=e_awsnap_rl&rd=1

was working fine before, started happening after the upgrade to the latest DEV

Does it occur on multiple sites: No

Is it a problem with a plugin? No 

Did this work before? Yes 

Does this work in other browsers? N/A

Chrome version: 57.0.2979.0  Channel: dev
OS Version: OS X 10.12.3
Flash Version: 

Google Chrome	57.0.2979.0 (Official Build) dev (64-bit)
Revision	1916748e2f13a9f80080d010a9adc6ba74028a59-refs/heads/master@{#443120}
OS	Mac OS X 
JavaScript	V8 5.7.441
Flash	24.0.0.201 /Users/fernando/Library/Application Support/Google/Chrome/PepperFlash/24.0.0.201/PepperFlashPlayer.plugin
User Agent	Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2979.0 Safari/537.36
Command Line	/Applications/Google Chrome.app/Contents/MacOS/Google Chrome -psn_0_221238 --flag-switches-begin --enable-offer-upload-credit-cards --enable-default-media-session=duck-flash --enable-es3-apis --enable-extension-action-redesign --enable-fullscreen-tab-detaching --enable-fullscreen-toolbar-reveal --google-profile-info --enable-hosted-app-quit-notification --enable-md-policy-page --enable-offer-store-unmasked-wallet-cards --enable-offline-auto-reload --enable-permission-action-reporting --enable-quic --enable-site-settings --enable-spelling-feedback-field-trial --enable-tab-audio-muting --enable-scripts-require-action --mark-non-secure-as=non-secure --reduced-referrer-granularity --secondary-ui-md --enable-features=AutomaticTabDiscarding,ExpensiveBackgroundTimerThrottling,FeaturePolicy,MaterialDesignUserMenu,PermissionsBlacklist,PreferHtmlOverPlugins,SafeSearchUrlReporting,ScrollAnchoring,brotli-encoding,enable-automatic-password-saving --flag-switches-end