I would like to use Google Chrome instead of the WebKit Framework in one of my projects. I found the 'chromiumembedded' project for Windows but nothing similar for Mac. Best would be to have it in form of a Framework to just drop it into a XCode project.
Question: Is there an easy way to integrate the Webkit of Google Chromium in own MacOS X projects?
Are you aware that Google Chrome already uses WebKit?
Quote from here
We owe a great debt to many open source projects, and we're committed to continuing on their path. We've used components from Apple's WebKit and Mozilla's Firefox, among others - and in that spirit, we are making all of our code open source as well. We hope to collaborate with the entire community to help drive the web forward.
Since they don't seem to have a working Mac version up for the general public, I would assume that this does not exist unless you happen to be a Google employee.
There are xcode project files throughout the Chromium code and you'll find that WebKit has its own xcodeproj files. Note that Chromium's WebKit routinely merges with the trunk WebKit and upstreams its changes. I don't really see why you'd want to go through the trouble of pulling from the Chromium's WebKit tree rather than getting it from the head WebKit revision. However you should be able to grab the {$chromium_trunk}/src/third_party/WebKit directory to get Chromium's version of WebKit. There aren't any dependencies on the Chromium browser specific code so that won't be an issue.
What are you trying to get from this; a rendering engine or a browser? The ambiguity in your question leaves a lot of confusion in interpretation.
If your looking at embedded browsers you may want to check out Android's WebKit browser. Android is open source as well.