GitLab

Links the native visualizers into the PDB so that Visual Studio will pick up the visualizers with no user action.

Adds visualizers for base::flat_set, base::flat_tree (these two had the info buried in several levels of tree), base::ManualConstructor (requires a cast), and base::Value (decodes the union).

Removes some aura visualizers. I didn't see these as adding much value.

Simplifies many of the other visualizers to only improve the summary and not list any <Expand> items. This causes VS to show the default expansion. Many of these seemed unhelpful and possibly confusing (converting gfx::Point's "x_" to "X"), dangerously misleading (converting Skia's rect which is left, top, right, button to use width, height format), and broken (GURL's components had typos and didn't work).

Review-Url: https://codereview.chromium.org/2895043002
Cr-Commit-Position: refs/heads/master@{#473767}