Add chrome://process-internals WebUI

This CL adds barebones implementation of chrome://process-internals
WebUI, which only shows the current Site Isolation mode and list
of origins isolated by policy or command line.

Bug: 850087
Change-Id: I14b8e20bc763488e8b4ea433599125c96c5ba8d3
Reviewed-on: https://chromium-review.googlesource.com/1091167
Commit-Queue: Nasko Oskov <[email protected]>
Reviewed-by: Daniel Cheng <[email protected]>
Cr-Commit-Position: refs/heads/master@{#566638}
diff --git a/content/BUILD.gn b/content/BUILD.gn
index 8ec381e..835bd6d 100644
--- a/content/BUILD.gn
+++ b/content/BUILD.gn
@@ -121,6 +121,7 @@
     "root_gen_dir=" + rebase_path(root_gen_dir, root_build_dir),
   ]
   deps = [
+    "//content/browser/process_internals:mojo_bindings_js",
     "//content/public/app:browser_manifest",
     "//content/public/app:gpu_manifest",
     "//content/public/app:packaged_services_manifest",