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 5e54699a3a15df6fd1ea78913c73b5f68fff0225..5663185014553e7b029f24f52897c90dc9349c7a 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
@@ -407,6 +407,7 @@ public class ThreadedInputConnection extends BaseInputConnection
      */
     @Override
     public boolean beginBatchEdit() {
+        assertOnImeThread();
         if (DEBUG_LOGS) Log.w(TAG, "beginBatchEdit [%b]", (mNumNestedBatchEdits == 0));
         mNumNestedBatchEdits++;
         if (mNumNestedBatchEdits == 1) {
@@ -420,6 +421,7 @@ 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));