Revert of Android: support multiple displays on C++ side

ui/android/BUILD.gn

Index: ui/android/BUILD.gn
diff --git a/ui/android/BUILD.gn b/ui/android/BUILD.gn
index b2fd58dd43ca9dbbc903f5a73db8a3d2fcb5d624..4a5187f12e6d5d8a2c064985307022c5403da101 100644
--- a/ui/android/BUILD.gn
+++ b/ui/android/BUILD.gn
@@ -15,8 +15,6 @@
     "context_provider_factory.h",
     "delegated_frame_host_android.cc",
     "delegated_frame_host_android.h",
-    "display_android_manager.cc",
-    "display_android_manager.h",
     "edge_effect.cc",
     "edge_effect.h",
     "edge_effect_base.cc",
@@ -34,7 +32,6 @@
     "resources/resource_manager_impl.cc",
     "resources/resource_manager_impl.h",
     "resources/ui_resource_provider.h",
-    "screen_android.h",
     "ui_android_export.h",
     "ui_android_jni_registrar.cc",
     "ui_android_jni_registrar.h",
@@ -61,24 +58,10 @@
   ]
 }
 
-static_library("test_support") {
-  testonly = true
-  sources = [
-    "dummy_screen_android.cc",
-    "dummy_screen_android.h",
-  ]
-
-  deps = [
-    "//ui/android",
-    "//ui/display",
-  ]
-}
-
 generate_jni("ui_android_jni_headers") {
   sources = [
     "java/src/org/chromium/ui/base/ViewAndroidDelegate.java",
     "java/src/org/chromium/ui/base/WindowAndroid.java",
-    "java/src/org/chromium/ui/display/DisplayAndroidManager.java",
     "java/src/org/chromium/ui/resources/ResourceManager.java",
   ]
   jni_package = "ui_android"