Fix HDCP in mirror mode.

ui/display/chromeos/display_configurator.h

Index: ui/display/chromeos/display_configurator.h
diff --git a/ui/display/chromeos/display_configurator.h b/ui/display/chromeos/display_configurator.h
index 028a902ef48535579157169f3f0e7c3a6fc77746..e9fda5c9eb48d41ee9b3c64644131d5f00bc2939 100644
--- a/ui/display/chromeos/display_configurator.h
+++ b/ui/display/chromeos/display_configurator.h
@@ -105,6 +105,7 @@ class DISPLAY_EXPORT DisplayConfigurator : public NativeDisplayObserver {
 
     // Called when the hardware mirroring failed.
     virtual void SetSoftwareMirroring(bool enabled) = 0;
+    virtual bool SoftwareMirroringEnabled() const = 0;
   };
 
   class TouchscreenDelegate {
@@ -354,6 +355,9 @@ class DISPLAY_EXPORT DisplayConfigurator : public NativeDisplayObserver {
   // (mirror_mode_width * mirrow_mode_height) / (native_width * native_height)
   float GetMirroredDisplayAreaRatio(const DisplayState& display);
 
+  // Returns true if in either hardware or software mirroring mode.
+  bool IsMirroring() const;
+
   // Applies display protections according to requests.
   bool ApplyProtections(const ContentProtections& requests);