Bring back assertions for beginBatchEdit / endBatchEdit

content/public/android/java/src/org/chromium/content/browser/input/ThreadedInputConnection.java

Index: content/public/android/java/src/org/chromium/content/browser/input/ThreadedInputConnection.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/input/ThreadedInputConnection.java b/content/public/android/java/src/org/chromium/content/browser/input/ThreadedInputConnection.java
index bd3dce346f4f64204b5b37bebcd9907d15dc880b..5aba4acc080ccb40c8f940f05ea3defb9d321c6b 100644
--- a/content/public/android/java/src/org/chromium/content/browser/input/ThreadedInputConnection.java
+++ b/content/public/android/java/src/org/chromium/content/browser/input/ThreadedInputConnection.java
@@ -408,6 +408,7 @@ public class ThreadedInputConnection extends BaseInputConnection
      */
     @Override
     public boolean beginBatchEdit() {
+        assertOnImeThread();
         if (DEBUG_LOGS) Log.w(TAG, "beginBatchEdit [%b]", (mNumNestedBatchEdits == 0));
         mNumNestedBatchEdits++;
         if (mNumNestedBatchEdits == 1) {
@@ -421,6 +422,7 @@ public class ThreadedInputConnection extends BaseInputConnection
      */
     @Override
     public boolean endBatchEdit() {
+        assertOnImeThread();
         if (mNumNestedBatchEdits == 0) return false;
         --mNumNestedBatchEdits;
         if (DEBUG_LOGS) Log.w(TAG, "endBatchEdit [%b]", (mNumNestedBatchEdits == 0));