Split //ui/gl into //ui/gl + //ui/gi/init.

Refactor //ui/gl to fix Ozone dep problem. This CL is step 1 described
in the associated bug.

BUG=611142
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review-Url: https://codereview.chromium.org/1920163005
Cr-Commit-Position: refs/heads/master@{#393838}
diff --git a/gpu/BUILD.gn b/gpu/BUILD.gn
index 1759ef2..9e96a4a 100644
--- a/gpu/BUILD.gn
+++ b/gpu/BUILD.gn
@@ -391,6 +391,7 @@
     "//testing/perf",
     "//ui/gfx/geometry",
     "//ui/gl",
+    "//ui/gl/init",
   ]
 
   # This target should not require the Chrome executable to run.