In light of the recent controversy (Dec 2013) over the Chrome extension titled \"Window Resizer\", what are some alternative solutions to quickly resizing the Chrome browser for
Another native solution to test responsive designs is to use the built-in Chrome Developer Tools. Choose Tools->Developer Tools, then click the gear icon in the bottom-right corner of the window that pops up. Click "Enable" then click "Device Metrics" and you can specify whatever resolution you'd like to replicate.
Also, by changing the "User Agent" on that screen, Chrome sets the device metrics for the chosen device, which may come in-handy when deciding where your responsive breakpoints should be for the more-popular devices.
This isn't as easy as a two-click extension, but it has the advantage of being an extension-less solution, and also using exact screen measurements of actual devices.
To update @Dave's answer, as of Chrome 35.0.1916.153 m, you need to select the Show drawer icon (>=) to the left of the gear icon, select Sources then the Emulation tab.
To get the most current tools go to @FireCodings link to Google's mobile emulation development tools, and download/install Chrome Canary. Then in Canary choose Tools->Developer Tools, click the mobile icon in the top-left corner of the tools window (at the bottom of the browser), click Sources, and then Emulation. The information is there on the Google page link to demonstrate how to use the tools.
Actually, the developer backed down and ended up removing the offending piece of code (called "Ecolinks") from their extension. As of today, the affiliate stuff is supposed to be gone.
Source: https://productforums.google.com/d/msg/chrome/mlAD1ygc0v0/gKLKWxoGrkIJ
Changelog for version 1.9.0.3
Version 1.9.0.3 (2014-01-15): Due to popular demand, I have removed the EcoLinks.
You can download the extension directly from this post in the official developer site
http://windowresizer.userecho.com/topic/353032-did-you-pull-your-extension-from-the-google-store/
I was trying find something to use too, but none is like this extension, the best to me so far