UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.146 Safari/537.36

Steps to reproduce the problem:
1. Open Developer Tools
2. Cmd+Shift+M or click on "Toggle Device toolbar" button
3. Select a mobile device from the list, or create a custom device with pixelRatio > 1

What is the expected behavior?
As until Chrome 64.x, it should render the page completely as in a real mobile device

What went wrong?
It now renders only 1/pixelRatio width and 1/pixelRatio height of the screen (e.g 1/9 of the image if pixelRatio is 3, like in Pixel 2 Phones). Also Capture Screenshot feature is attached

See attached files (one from dev tools, other from capture screenshot)

I tried on Windows 10 (Surface 3 laptop) and it works correctly, so it seems to be a macOS release issue.

Did this work before? Yes Any Chrome 64.x or lower. I just upgraded.

Chrome version: 65.0.3325.146  Channel: stable
OS Version: OS X 10.13.0
Flash Version: Shockwave Flash 28.0 r0
 

Deleted: chrome bug.png 21.2 KB

	chrome bug.png 21.2 KB View Download

Deleted: www.google.it_(Pixel 2).png 79.7 KB

	www.google.it_(Pixel 2).png 79.7 KB View Download