Introduce ThreadedInputConnection behind a switch

content/browser/renderer_host/ime_adapter_android.cc

Index: content/browser/renderer_host/ime_adapter_android.cc
diff --git a/content/browser/renderer_host/ime_adapter_android.cc b/content/browser/renderer_host/ime_adapter_android.cc
index 2468b62db62bd6a7dd7c50267be43029d63242a4..77c518d13a99fb2ac3402a1249523b487da9f62c 100644
--- a/content/browser/renderer_host/ime_adapter_android.cc
+++ b/content/browser/renderer_host/ime_adapter_android.cc
@@ -251,6 +251,15 @@ void ImeAdapterAndroid::FocusedNodeChanged(bool is_editable_node) {
   }
 }
 
+void ImeAdapterAndroid::Unblock() {
+  base::android::ScopedJavaLocalRef<jobject> obj =
+      java_ime_adapter_.get(AttachCurrentThread());
+  if (!obj.is_null()) {
+    Java_ImeAdapter_unblock(AttachCurrentThread(),
+                            obj.obj());
+  }
+}
+
 void ImeAdapterAndroid::SetEditableSelectionOffsets(
     JNIEnv*,
     const JavaParamRef<jobject>&,
@@ -290,6 +299,16 @@ void ImeAdapterAndroid::DeleteSurroundingText(JNIEnv*,
     rfh->ExtendSelectionAndDelete(before, after);
 }
 
+bool ImeAdapterAndroid::RequestTextInputStateUpdate(
+    JNIEnv* env,
+    const JavaParamRef<jobject>&) {
+  RenderWidgetHostImpl* rwhi = GetRenderWidgetHostImpl();
+  if (!rwhi)
+    return false;
+  rwhi->Send(new InputMsg_RequestTextInputStateUpdate(rwhi->GetRoutingID()));
+  return true;
+}
+
 void ImeAdapterAndroid::ResetImeAdapter(JNIEnv* env,
                                         const JavaParamRef<jobject>&) {
   java_ime_adapter_.reset();