Class for allocating a chunk of memory for RenderPass

Class for allocating a chunk of memory for RenderPass

For DrawQuads and SharedQuadState, RenderPass used allocate them one by
one whenever needed. This new class helps RenderPass manages allocation
and iteration of those two types. This container allocates a chunk of
memory at one time and hands out raw pointers. It also provides iterator
and reverse iterators for going through its contents.

Unittest for ListContainer makes sure the raw pointers it hands out are
valid and iterator has same behavior as vector iterators.

Follows 398533002, and 404563005.

BUG=344962

Review URL: https://codereview.chromium.org/400463002

Cr-Commit-Position: refs/heads/master@{#296100}