Revert "Make sure ANGLE can find the proper libraries when running tests"

This reverts commit d2ee30a3.

Reason for revert: Caused gl_tests_validating failure on Linux CFI bot:
https://ci.chromium.org/p/chromium/builders/ci/Linux%20CFI/19128

Original change's description:
> Make sure ANGLE can find the proper libraries when running tests
>
> This cl is in the context of replacing SwiftShader's GL libraries
> with SwANGLE (ANGLE with SwiftShader Vulkan as its backend). In order
> to allow ANGLE to find the proper libvulkan.so when executing tests
> on the bots, we have to make sure the proper rpath is set.
>
> This affects all tests that depend directly or indirectly on
> //ui/gl:test_support.
>
> The affected tests include:
> app_shell_unittests
> aura_unittests
> cc_unittests
> compositor_unittests
> gpu_unittests
> interactive_ui_tests
> message_center_unittests
> media_unittests
> snapshot_unittests
> unit_tests
> views_unittests
> viz_unittests
> wm_unittests
>
> Bug: chromium:1060139
> Change-Id: Ida242f511599d38ad1ec16e0f4711d80a957cc8f
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2565490
> Reviewed-by: Kenneth Russell <kbr@chromium.org>
> Reviewed-by: Greg Thompson <grt@chromium.org>
> Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
> Reviewed-by: danakj <danakj@chromium.org>
> Commit-Queue: Alexis Hétu <sugoi@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#833354}

TBR=danakj@chromium.org,dalecurtis@chromium.org,thakis@chromium.org,sugoi@chromium.org,kbr@chromium.org,rdevlin.cronin@chromium.org,grt@chromium.org,chromium-scoped@luci-project-accounts.iam.gserviceaccount.com,sugoi@google.com

Change-Id: Icd0336a4d82b734804be88a0120ad26465f5e5e8
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:1060139
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2573258Reviewed-by: Kunihiko Sakamoto <ksakamoto@chromium.org>
Commit-Queue: Kunihiko Sakamoto <ksakamoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#833525}

content/test/BUILD.gn

@@ -387,7 +387,6 @@ static_library("test_support") {
     "//third_party/blink/public:blink",
     "//third_party/blink/public:test_support",
     "//third_party/blink/public/strings:strings_grit",
-    "//ui/gl:test_support",
   ]
 
   deps = [
@@ -460,6 +459,7 @@ static_library("test_support") {
     "//ui/events/blink",
     "//ui/gfx:test_support",
     "//ui/gl",
+    "//ui/gl:test_support",
     "//ui/native_theme",
     "//ui/resources",
     "//ui/shell_dialogs:shell_dialogs",

ui/gl/BUILD.gn

@@ -512,15 +512,6 @@ static_library("test_support") {
   if (use_ozone) {
     deps += [ "//ui/ozone" ]
   }
-
-  public_configs = []
-
-  # If the run-time search path isn't set properly when we use ANGLE with its
-  # Vulkan backend, it may end up finding the system libvulkan.so rather than
-  # the one built in the output directory
-  if ((is_linux || is_chromeos) && !is_component_build) {
-    public_configs += [ "//build/config/gcc:rpath_for_built_shared_libraries" ]
-  }
 }
 
 source_set("run_all_unittests") {