ui: Cleanup class/struct forward declarations

chrome/browser/media/webrtc/native_desktop_media_list.h

Index: chrome/browser/media/webrtc/native_desktop_media_list.h
diff --git a/chrome/browser/media/webrtc/native_desktop_media_list.h b/chrome/browser/media/webrtc/native_desktop_media_list.h
index 2d4056145effb729cc3c99322dd5c44dfde55e9d..dabab11d230ce622210d8df2e84882f2f11daa29 100644
--- a/chrome/browser/media/webrtc/native_desktop_media_list.h
+++ b/chrome/browser/media/webrtc/native_desktop_media_list.h
@@ -14,8 +14,7 @@
 #include "ui/gfx/image/image.h"
 
 namespace webrtc {
-class ScreenCapturer;
-class WindowCapturer;
+class DesktopCapturer;
 }
 
 // Implementation of DesktopMediaList that shows native screens and
@@ -26,8 +25,8 @@ class NativeDesktopMediaList : public DesktopMediaListBase {
   // types of sources the model should be populated with (e.g. it will only
   // contain windows, if |screen_capturer| is NULL).
   NativeDesktopMediaList(
-      std::unique_ptr<webrtc::ScreenCapturer> screen_capturer,
-      std::unique_ptr<webrtc::WindowCapturer> window_capturer);
+      std::unique_ptr<webrtc::DesktopCapturer> screen_capturer,
+      std::unique_ptr<webrtc::DesktopCapturer> window_capturer);
   ~NativeDesktopMediaList() override;
 
  private: