Removed SpdyFramer::CreateDataFrame()

SpdyFramer::SerializeData() is to be used instead. This is part of
SpdyFramer::Create*() method cleanup.

This lands server change 58359100 by mlavan.

Removed additional SpdyFramer::Create* methods.

GoAway, CreatePingFrame, CreateBlocked and CreateWindowUpdate
are removed. Part of cleanup of SpdyFramer::Create*() methods.

This lands server change 58551094 by mlavan.

Got rid of SpdyFramer::CreateSettings().

Part of SpdyFramer::Create*() method cleanup.
    
This lands server change 58559769 by mlavan.

Also modified SpdyTestUtils & BufferedSpdyFramer wrappers around construction and serialization of intermediate representations. Ideally, these conveniences would be removed in preference to direct use of IR's.

Review URL: https://codereview.chromium.org/139763002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246362 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246362