Google, maker of the Chrome browser, has already stated it would be pausing many FLASH animations. In their latest posting, they emphasize this will begin September 1st, 2015 and they suggest that the makers of the ads change from FLASH to HTML 5 to ensure the ads keep displaying:

…from:
https://plus.google.com/+GoogleAds/posts/2PmwKinJ7nj

Shared publicly  -  27 Aug 2015
 
In June, we announced (https://goo.gl/TF7dmD) that Chrome will begin pausing many Flash ads by default to improve performance for users. This change is scheduled to start rolling out on September 1, 2015. 

Most Flash ads uploaded to AdWords are automatically converted to HTML5. To ensure your ads continue to show on the Google Display Network, please follow these steps before September 1:

1) Identify any Flash ads in your account that aren’t eligible for automatic conversion: https://goo.gl/I4186A 
2) Convert these ads to HTML5: https://goo.gl/ZBq5DR
Bringing Better Performance to Rich Media on Chrome Video and interactive…
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NOTE: this is in addition to the Chrome embargo on NPAPI plugins such as VLC:
NPAPI plugins don't work on Chrome version 42 and higher
https://support.google.com/chrome/answer/6213033?hl=en