Fix Vulkan build on Android

Building for Android with Vulkan support previously did not work. There
was some existing Android + Vulkan code which needed a little clean up.

This patch enables Vulkan support on Android builds.

BUG=842302,850725,848375

Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
Change-Id: I077fe775c7d387e5c65c0024e88421ba47ce6280
Reviewed-on: https://chromium-review.googlesource.com/1110754
Reviewed-by: Brian Salomon <[email protected]>
Reviewed-by: Min Qin <[email protected]>
Reviewed-by: Tobias Sargeant <[email protected]>
Reviewed-by: Eric Karl <[email protected]>
Reviewed-by: Antoine Labour <[email protected]>
Commit-Queue: Chris Blume <[email protected]>
Cr-Commit-Position: refs/heads/master@{#573613}
diff --git a/content/browser/BUILD.gn b/content/browser/BUILD.gn
index 3a2982b..bcb8f0d 100644
--- a/content/browser/BUILD.gn
+++ b/content/browser/BUILD.gn
@@ -2213,6 +2213,9 @@
       "//ui/compositor",
       "//ui/compositor/host",
     ]
+    if (enable_vulkan) {
+      deps += [ "//gpu/vulkan/init" ]
+    }
     defines += [
       "APPCACHE_USE_SIMPLE_CACHE",
       "ENABLE_SCREEN_CAPTURE=1",