Bug 1079400. Limit the maximum render target size to avoid crashes. r=jgilbert

This avoids crashes with certain NVIDIA drivers.

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extra : rebase_source : 38eb492063e29a23c3278bbef73020d90204d607
Bug 1109339. Fixup some ANGLE format stuff. r=jgilbert

This fixes the classic BGRA/RGBA mismatch with D3D11 by making Renderer11.cpp
do the same thing as Renderer9.cpp from bug 1096634

It also fixes an assertion failure that happens when building the stencil
map caused by Bug 1088345.

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extra : rebase_source : 0fbe2902ede19a5fdb4898c7d27c62e6f59e954a
Bug 1079398. Enable D3D11 ANGLE by default. r=jgilbert

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extra : rebase_source : e2c1e91b30b8c8409531c7950813b2bf0d740297