Some platform features modify their behavior based on effective connection type [1]. For example, video disable preloading [2] when on a "cellular" connection. 

Ideally, throttling configuration in DevTools would allow you to manually set and override the type reported by the NetInfo API, and same would be reflected in our state NetworkStateNotifier.

[1] https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit/Source/core/page/NetworkStateNotifier.h&l=77
[2] https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit/Source/core/html/HTMLMediaElement.cpp&l=1969-1973