Remove the close button in context menu for IME menu.

chrome/common/extensions/extension_constants.cc

Index: chrome/common/extensions/extension_constants.cc
diff --git a/chrome/common/extensions/extension_constants.cc b/chrome/common/extensions/extension_constants.cc
index 5a722655a414415238c9591e7dda36acb3119845..81bc30f43ec5a5406a2f7cecc2588d33ac87aa40 100644
--- a/chrome/common/extensions/extension_constants.cc
+++ b/chrome/common/extensions/extension_constants.cc
@@ -126,4 +126,15 @@ const uint8_t kWebstoreSignaturesPublicKey[] = {
 const int kWebstoreSignaturesPublicKeySize =
     arraysize(kWebstoreSignaturesPublicKey);
 
+#if defined(OS_CHROMEOS)
+bool IsImeMenuExtensionId(const std::string& extension_id) {
+  const char* const kImeMenuExtensionIds[] = {
+      "gjaehgfemfahhmlgpdfknkhdnemmolop", "jkghodnilhceideoidjikpgommlajknk"};
+  for (const char* id : kImeMenuExtensionIds) {
+    if (extension_id == id)
+      return true;
+  }
+  return false;
+}
+#endif
 }  // namespace extension_misc