Revert of Let ImeAdapterAndroid have the same lifecycle as its Java peer

chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java

Index: chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java b/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
index ed0bc3c71ce1d32da7413075e15f9a9f9cac92cf..5623df08703de7d5b766f1edca9a398e92bcbe10 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
@@ -2321,6 +2321,8 @@
         newContentViewCore.onShow();
         setContentViewCore(newContentViewCore);
 
+        mContentViewCore.attachImeAdapter();
+
         // If the URL has already committed (e.g. prerendering), tell process management logic that
         // it can rely on the process visibility signal for binding management.
         // TODO: Call ChildProcessLauncher#determinedVisibility() at a more intuitive time.