Remove unused RenderPassDrawQuad fields

The contents_changed_since_last_frame and is_replica fields are not
used. Also removes RenderSurfaceImpl's ContentsChanged() as this method
was only used in determining the value of
contents_changed_since_last_frame.

Unfortunately now RenderPassDrawQuad is only the largest quad type on
64-bit builds. So, adds kLargestQuadType to cc/quads/ and moves the
largest-quad-type unit test there verifying that kLargestQuadType is
the largest now, instead of RenderPassDrawQuad.

R=enne
BUG=401481
NOTRY=true

Review URL: https://codereview.chromium.org/448133002

Cr-Commit-Position: refs/heads/master@{#289091}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@289091 0039d316-1c4b-4281-b951-d872f2087c98

• cc/BUILD.gn[diff]
• cc/cc.gyp[diff]
• cc/layers/delegated_renderer_layer_impl_unittest.cc[diff]
• cc/layers/render_surface_impl.cc[diff]
• cc/layers/render_surface_impl.h[diff]
• cc/output/renderer_pixeltest.cc[diff]
• cc/quads/draw_quad_unittest.cc[diff]
• cc/quads/largest_draw_quad.h[Added - diff]
• cc/quads/render_pass_draw_quad.cc[diff]
• cc/quads/render_pass_draw_quad.h[diff]
• cc/quads/render_pass_unittest.cc[diff]
• cc/surfaces/surface_aggregator_test_helpers.cc[diff]
• cc/test/render_pass_test_common.cc[diff]
• cc/test/render_pass_test_utils.cc[diff]
• cc/trees/layer_tree_host_impl_unittest.cc[diff]
• cc/trees/layer_tree_host_unittest_delegated.cc[diff]
• content/common/cc_messages.cc[diff]
• content/common/cc_messages.h[diff]
• content/common/cc_messages_unittest.cc[diff]