[ui/display] Change component name on Windows.

"display.dll" is a Windows system dll.  This causes a clash in debug component builds.
Change the GN output_name for the display component to "ui_display".

Ref: crbug/818388

Test: chromium.gpu waterfall bot (debug component), or chromium.gpu.fyi.
Change-Id: Ibdb41cb6841708c61893a0e05d00f5af17b583cd
Reviewed-on: https://chromium-review.googlesource.com/1152099Reviewed-by: Robert Liao <robliao@chromium.org>
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Commit-Queue: Penny MacNeil <pennymac@chromium.org>
Cr-Commit-Position: refs/heads/master@{#578865}

ui/display/BUILD.gn

@@ -64,6 +64,11 @@ component("display") {
     "//ui/gfx/geometry",
   ]
 
+  if (is_win) {
+    # Don't conflict with Windows' "display.dll".
+    output_name = "ui_display"
+  }
+
   if (!use_aura) {
     sources -= [ "screen_aura.cc" ]
   }