Google is rumored to use a Qualcomm Snapdragon 835 processor for the upcoming Pixel 2 devices, as a new set of data in the Android Open Source Project references both the latest Qualcomm CPU and the codenames that have been said to belong to the upcoming smartphones. Muskie, Walleye, and Taimen have all three been rumored to be new Pixel devices that Google has in the works and there have been a number of leaks surrounding those internal codenames but nothing really in the way of concrete specifications at this point. Thanks to these new code commits it's now likely that Google has locked down the CPU choice, though it was probably a very likely scenario that Google would go with the Snapdragon 835 in the first place given the timing of the expected release.
In the first image below you can see the model number MSM8998 which doesn't seem like much if you aren't familiar with the Qualcomm processor model numbers, but this is the model number for the Snapdragon 835. In the second image various users that are contributors to this particular code commit mention Muskie, Walleye, and Taimen as target devices for the new chipset. This is unfortunately the only information that can really be picked up from this data, which means there are no other specs or features that can be highlighted at this time. However, more information on the new Pixel devices is bound to come up once it gets closer to Google I/O, and even closer still to the launch of the new phones which is expected to happen in the Fall, most likely in the first week of October just as it was last year for the first generation Pixels.
While there aren't any other details regarding specs in the commit, it was already stated by Google earlier in the year that the second generation of Pixel smartphones would be premium devices, and the Qualcomm Snapdragon 835 CPU is certainly a premium choice for the processor. Considering this the rest of the specs are likely to be just as high-end although the specifics of them may not surface until much later in the year. There have been some other rumors though that suggest Google will change things up a bit by doing things like getting rid of the 3.5mm audio port on these new devices.