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

content/public/common/content_switches.cc

Index: content/public/common/content_switches.cc
diff --git a/content/public/common/content_switches.cc b/content/public/common/content_switches.cc
index 49f21808f49a7e65b747b90d5557c89a3586a6dc..fc2cdc2d12758a51340da6955b2310db5af9799c 100644
--- a/content/public/common/content_switches.cc
+++ b/content/public/common/content_switches.cc
@@ -435,6 +435,12 @@ const char kEnableSmoothScrolling[]         = "enable-smooth-scrolling";
 // Enables StatsTable, logging statistics to a global named shared memory table.
 const char kEnableStatsTable[]              = "enable-stats-table";
 
+// Enables ordered handling of 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.
+const char kEnableOrderedImeProcessing[]     = "enable-ordered-ime-processing";
+
 // Experimentally ensures that each renderer process:
 // 1) Only handles rendering for pages from a single site, apart from iframes.
 // (Note that a page can reference content from multiple origins due to images,