Support device scale factor test with popups in LayoutTest

content/shell/browser/blink_test_controller.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/shell/browser/blink_test_controller.h"
 
 #include <iostream>
 
 #include "base/base64.h"
 #include "base/callback.h"
@@ skipping 395 matching lines @@
     IPC_MESSAGE_HANDLER(ShellViewHostMsg_CloseRemainingWindows,
                         OnCloseRemainingWindows)
     IPC_MESSAGE_HANDLER(ShellViewHostMsg_ResetDone, OnResetDone)
     IPC_MESSAGE_HANDLER(ShellViewHostMsg_LeakDetectionDone, OnLeakDetectionDone)
     IPC_MESSAGE_HANDLER(ShellViewHostMsg_SetBluetoothManualChooser,
                         OnSetBluetoothManualChooser)
     IPC_MESSAGE_HANDLER(ShellViewHostMsg_GetBluetoothManualChooserEvents,
                         OnGetBluetoothManualChooserEvents)
     IPC_MESSAGE_HANDLER(ShellViewHostMsg_SendBluetoothManualChooserEvent,
                         OnSendBluetoothManualChooserEvent)
+    IPC_MESSAGE_HANDLER(ShellViewHostMsg_SetDeviceScaleFactor,
+                        OnSetDeviceScaleFactor)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
   return handled;
 }
 
 void BlinkTestController::PluginCrashed(const base::FilePath& plugin_path,
                                         base::ProcessId plugin_pid) {
   DCHECK(CalledOnValidThread());
   printer_->AddErrorMessage(
@@ skipping 339 matching lines @@
     event = BluetoothChooser::Event::RESCAN;
   } else {
     printer_->AddErrorMessage(base::StringPrintf(
         "FAIL: Unexpected sendBluetoothManualChooserEvent() event name '%s'.",
         event_name.c_str()));
     return;
   }
   bluetooth_chooser_factory_->SendEvent(event, argument);
 }
 
+void BlinkTestController::OnSetDeviceScaleFactor(float scale) {
+  main_window_->SetDeviceScaleFactor(scale);
+}
+
 }  // namespace content