Take 2:

Rework the FlipProtocol to separate the C-like 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 self-clean 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

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@31277 0039d316-1c4b-4281-b951-d872f2087c98

• net/flip/flip_frame_builder.h[diff]
• net/flip/flip_framer.cc[diff]
• net/flip/flip_framer.h[diff]
• net/flip/flip_framer_test.cc[diff]
• net/flip/flip_protocol.h[diff]
• net/flip/flip_protocol_test.cc[Added - diff]
• net/flip/flip_session.cc[diff]
• net/flip/flip_session.h[diff]