Revert 287855 "1. Adds action-parsing functionality for data red..."

Revert 287855 "1. Adds action-parsing functionality for data red..."

Causing timeout on "Win7 Tests (dbg)(1)"
http://build.chromium.org/p/chromium.win/builders/Win7%20Tests%20%28dbg%29%281%29/builds/30316

> 1. Adds action-parsing functionality for data reduction proxy header.
> 
> 2. Adds a couple of functions to return different fingerprint value for tamper detection.
> 
> 3. Adds a function to remove Chrome-Proxy header's fingerprint from its header values, and return the rest of header values.
> 
> 4. Changes HasDataReductionProxyViaHeader to also tell 
> whether data reduction proxy Via header occurs at the last 
> or not.
> 
> 
> BUG=381907
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=287561
> 
> Review URL: https://codereview.chromium.org/387353003

TBR=xingx@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=287975

[hashimoto, 2014-08-07 07:04:01]

Committed patchset #1 manually as r287975.