Require ACK for editor-related changes not originating from browser.

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 17fae2320aef9d4b4470f768d2c8ee2761caba30..4d52332ae9763f895ef6f4def6c092e6feff6711 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -6543,6 +6543,12 @@ Keep your key file in a safe place. You will need it to create new versions of y
       <message name="IDS_FLAGS_ENABLE_GESTURE_TAP_HIGHLIGHTING_DESCRIPTION" desc="Description for the flag to turn on gesture tap highlighting">
         Enable the experimental gesture tap highlight implementation.
       </message>
+      <message name="IDS_FLAGS_ENABLE_STRICT_IME_PROCESSING_NAME" desc="Title for the flag to enable strict IME processing">
+        Strict IME processing
+      </message>
+      <message name="IDS_FLAGS_ENABLE_STRICT_IME_PROCESSING_DESCRIPTION" desc="Description for the flag to enable strict IME processing">
+        Enables a very strict scheme of handling IME events. Some changes that relate to IME on on the renderer side requires acknowledgement from the browser process. If IME events are sent to the renderer while there are outstanding acknowledgements, the IME event will be dropped.
+      </message>
       <message name="IDS_FLAGS_ENABLE_SMOOTH_SCROLLING_NAME" desc="Title for the flag to turn on smooth scrolling">
         Smooth Scrolling
       </message>