Record Data Savings for Client-Side LoFi
This CL causes Chrome to record data savings for Client LoFi when it is
used, according to the Content-Range header if it's present (e.g.
"Content-Range: bytes 0-2047/10000" implies that the original resource
was 10000 bytes). This CL also adds a new PreviewsState bit field,
CLIENT_LOFI_AUTO_RELOAD, that is set when a Client LoFi image is auto
reloaded because of a decoding error, so that the browser process can
count the data used for the reload against the savings.
See design doc for more info:
https://docs.google.com/document/d/1CoZfTswPq67VaHKsr0OrkpPbWT87dhhvPq9hylOxrlU/edit
BUG=605347
Review-Url: https://codereview.chromium.org/2873793002
Cr-Commit-Position: refs/heads/master@{#470850}
12 files changed
