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

android_webview/browser/aw_browser_main_parts.cc

Index: android_webview/browser/aw_browser_main_parts.cc
diff --git a/android_webview/browser/aw_browser_main_parts.cc b/android_webview/browser/aw_browser_main_parts.cc
index bfb81d87d1e15995b2ed65d59d6d45ef15a12bc3..19fbd03ba24defe23efd851a03e15ec01b17273d 100644
--- a/android_webview/browser/aw_browser_main_parts.cc
+++ b/android_webview/browser/aw_browser_main_parts.cc
@@ -31,11 +31,13 @@
 #include "device/geolocation/geolocation_provider.h"
 #include "net/android/network_change_notifier_factory_android.h"
 #include "net/base/network_change_notifier.h"
+#include "ui/android/screen_android.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/layout.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/resource/resource_bundle_android.h"
 #include "ui/base/ui_base_paths.h"
+#include "ui/display/screen.h"
 #include "ui/gl/gl_surface.h"
 
 namespace android_webview {
@@ -120,6 +122,8 @@ int AwBrowserMainParts::PreCreateThreads() {
     breakpad::CrashMicroDumpManager::GetInstance();
   }
 
+  display::Screen::SetScreenInstance(ui::CreateScreenAndroid());
+
   return content::RESULT_CODE_NORMAL_EXIT;
 }