Revert 31277 - Take 2:

Rework the FlipProtocol to separate the Clike structs from the
methods.  Without this refactoring, we didn't have a clean way
to allocate and deallocate FlipFrames.  Now we can use the
scoped_ptr cleanly.

Summary of misc changes:
  * Merged in some small changes from the GFE side.
  * flip_protocol.h Changes substantially.  We now have separate
    structs and classes.  No longer can you cast from one frame
    type to another.  All FlipFrame classes derive from FlipFrame.
    A FlipFrame owns a buffer which is used for the frame, and
    when you create the Frame, you can specify whether the FlipFrame
    will selfclean its buffer or not.  This makes it cheap to
    instantiate a FlipFrame class on the stack and use it temporarily
    for accessing fields without having to do any copies or allocations.
  * You can't use sizeof(FlipFrame) anymore  that is now a class.
    Added a static "size()" method to each FlipFrame type for
    declaring its real size.
  * Refactored a couple of routines in flip_framer.  These were
    previously in a huge state machine (ProcessInput), just copied
    the code into subroutines.
  * Added flip_protocol_test to the mix from the gfe side.  Much of
    this is a refactoring from flip_framer_test.
  * Eliminated reinterpret_casts as much as I could and got rid of
    all uses of scoped_array for FlipFrames.


BUG=none
TEST=all flip tests reworked

Review URL: http://codereview.chromium.org/376012

TBR=mbelshe@google.com
Review URL: http://codereview.chromium.org/371027

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@31281 0039d316-1c4b-4281-b951-d872f2087c98

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