Add a Submit method to the keyboard interface

services/keyboard/src/org/chromium/mojo/keyboard/KeyboardServiceState.java

Index: services/keyboard/src/org/chromium/mojo/keyboard/KeyboardServiceState.java
diff --git a/services/keyboard/src/org/chromium/mojo/keyboard/KeyboardServiceState.java b/services/keyboard/src/org/chromium/mojo/keyboard/KeyboardServiceState.java
index 7196b24f89bebc68894b3ef2e31313be84d014d2..4b025f19849153975c65ec6bf5724663fdf8f91b 100644
--- a/services/keyboard/src/org/chromium/mojo/keyboard/KeyboardServiceState.java
+++ b/services/keyboard/src/org/chromium/mojo/keyboard/KeyboardServiceState.java
@@ -4,7 +4,10 @@
 
 package org.chromium.mojo.keyboard;
 
+import android.text.Editable;
 import android.text.InputType;
+import android.text.Selection;
+import android.text.SpannableStringBuilder;
 import android.view.View;
 import android.view.inputmethod.EditorInfo;
 import android.view.inputmethod.InputConnection;
@@ -18,23 +21,26 @@ public class KeyboardServiceState {
     private View mView;
     private KeyboardClient mActiveClient;
     private int mRequestedInputType;
+    private Editable mActiveEditable;
 
     public KeyboardServiceState(View view) {
         mView = view;
         mActiveClient = null;
         mRequestedInputType = InputType.TYPE_CLASS_TEXT;
+        mActiveEditable = null;
     }
 
     public InputConnection createInputConnection(EditorInfo outAttrs) {
         if (mActiveClient == null) return null;
         outAttrs.inputType = mRequestedInputType;
-        return new InputConnectionAdaptor(mView, mActiveClient, outAttrs);
+        return new InputConnectionAdaptor(mView, mActiveClient, mActiveEditable, outAttrs);
     }
 
     public void setClient(KeyboardClient client, int inputType) {
         if (mActiveClient != null) mActiveClient.close();
         mActiveClient = client;
         mRequestedInputType = inputType;
+        mActiveEditable = new SpannableStringBuilder();
     }
 
     public View getView() {
@@ -45,5 +51,14 @@ public class KeyboardServiceState {
         if (mActiveClient == null) return;
         mActiveClient.close();
         mActiveClient = null;
+        mActiveEditable = null;
+    }
+
+    public void setText(String text) {
+        mActiveEditable.replace(0, mActiveEditable.length(), text);
+    }
+
+    public void setSelection(int start, int end) {
+        Selection.setSelection(mActiveEditable, start, end);
     }
 }