Improve monitor compatibility error, move feedback link into button

ash/display/display_configuration_controller.cc

Index: ash/display/display_configuration_controller.cc
diff --git a/ash/display/display_configuration_controller.cc b/ash/display/display_configuration_controller.cc
index 1e7bc4c7803e15378aec7c69ec803e9da4519503..22f9dd1ed2a9f4edf87d07d96c6cd49ce0739d32 100644
--- a/ash/display/display_configuration_controller.cc
+++ b/ash/display/display_configuration_controller.cc
@@ -15,6 +15,7 @@
 #include "ash/display/display_animator_chromeos.h"
 #include "base/sys_info.h"
 #include "grit/ash_strings.h"
+#include "ui/base/l10n/l10n_util.h"
 #endif
 
 namespace {
@@ -84,8 +85,11 @@ void DisplayConfigurationController::SetMirrorMode(bool mirror,
                                                    bool user_action) {
   if (display_manager_->num_connected_displays() > 2) {
 #if defined(OS_CHROMEOS)
-    if (user_action)
-      ShowDisplayErrorNotification(IDS_ASH_DISPLAY_MIRRORING_NOT_SUPPORTED);
+    if (user_action) {
+      base::string16 message =
+          l10n_util::GetStringUTF16(IDS_ASH_DISPLAY_MIRRORING_NOT_SUPPORTED);

[Evan Stade, 2016/12/12 23:44:17]

nit: I'd prefer to inline this instead of creating a variable used once

[Greg Levin, 2016/12/13 01:48:59]

Done.

+      ShowDisplayErrorNotification(message, false);
+    }
 #endif
     return;
   }