Combine the WM_CHAR with WM_KEY* for key event flow.

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index 9ed6a9dc16d2b9007a59a92437eb4484123175ab..2d57579db4676ee1a204c0e564896c0d48c3a01f 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -15571,6 +15571,13 @@ After you create a new supervised user, you can manage their settings at any tim
       <message name="IDS_FLAGS_TRACE_EXPORT_EVENTS_TO_ETW_DESRIPTION" desc="Description for the flag to enable exporting of tracing events to ETW.">
         If enabled, trace events are exported to ETW and can be captured by either UIForETW or Xperf.
       </message>
+
+      <message name="IDS_FLAGS_MERGE_KEY_CHAR_EVENTS_NAME" desc="Name for the flag to enable/disable merging the key event with char event.">
+        Enable or disable merging merging the key event (WM_KEY*) with char event (WM_CHAR).
+      </message>
+      <message name="IDS_FLAGS_MERGE_KEY_CHAR_EVENTS_DESCRIPTION" desc="Description for the flag to enable/disable merging the key event with char event.">
+        If disabled, Chrome will handle WM_KEY* and WM_CHAR separatedly.
+      </message>
     </if>
 
     </messages>