Add missing dependency to fix the ubsan build.

See comment 1 on the bug.

Bug: 855610
Change-Id: I2e3ad59300cabc4ed2c74b671415bb2a6551997b
Reviewed-on: https://chromium-review.googlesource.com/1114267Reviewed-by: CJ DiMeglio <lethalantidote@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570486}

third_party/blink/renderer/platform/BUILD.gn

@@ -1512,6 +1512,7 @@ jumbo_component("platform") {
     "//mojo/public/cpp/bindings",
     "//mojo/public/cpp/bindings:wtf_support",
     "//services/service_manager/public/cpp",
+    "//services/ui/public/cpp/gpu",
     "//skia:skcms",
     "//third_party:freetype_harfbuzz",
     "//third_party/blink/public:embedded_frame_sink_mojo_bindings_blink",