cc: Rename QuadSink::Append to MaybeAppend.

This touches a lot of files, so keep it mindless. Then we can add
another append that does not do culling, and move callsites over
one at a time.

R=enne
BUG=344962

Review URL: https://codereview.chromium.org/196533010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256754 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/cc/trees/layer_tree_host_impl.cc b/cc/trees/layer_tree_host_impl.cc
index 0aa99219..7bc188d9 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -665,7 +665,7 @@
                  visible_screen_space_rect,
                  screen_background_color,
                  false);
-    quad_culler.Append(quad.PassAs<DrawQuad>());
+    quad_culler.MaybeAppend(quad.PassAs<DrawQuad>());
   }
   for (Region::Iterator fill_rects(overhang_region);
        fill_rects.has_rect();
@@ -693,7 +693,7 @@
         screen_background_color,
         vertex_opacity,
         false);
-    quad_culler.Append(tex_quad.PassAs<DrawQuad>());
+    quad_culler.MaybeAppend(tex_quad.PassAs<DrawQuad>());
   }
 }