mus: Remove DCHECK that was causing false positives.

services/ui/ws/platform_display.cc

Index: services/ui/ws/platform_display.cc
diff --git a/services/ui/ws/platform_display.cc b/services/ui/ws/platform_display.cc
index c6621388322c28daaad245e929f72c218485a4cf..f7693a18b98ecee46e49b366c55f08b82cc834d6 100644
--- a/services/ui/ws/platform_display.cc
+++ b/services/ui/ws/platform_display.cc
@@ -222,7 +222,9 @@ void DefaultPlatformDisplay::DispatchEvent(ui::Event* event) {
     ui::KeyEvent char_event(key_press_event->GetCharacter(),
                             key_press_event->key_code(),
                             key_press_event->flags());
-    DCHECK_EQ(key_press_event->GetCharacter(), char_event.GetCharacter());
+    // We don't check that GetCharacter() is equal because changing a key event
+    // with an accelerator to a character event can change the character, for
+    // example, from 'M' to '^M'.
     DCHECK_EQ(key_press_event->key_code(), char_event.key_code());
     DCHECK_EQ(key_press_event->flags(), char_event.flags());
     delegate_->OnEvent(char_event);