Changed Blimp IME to use PopUp

blimp/client/app/android/java/src/org/chromium/blimp/input/ImeEditText.java

Index: blimp/client/app/android/java/src/org/chromium/blimp/input/ImeEditText.java
diff --git a/blimp/client/app/android/java/src/org/chromium/blimp/input/ImeEditText.java b/blimp/client/app/android/java/src/org/chromium/blimp/input/ImeEditText.java
new file mode 100644
index 0000000000000000000000000000000000000000..459acc8837f1467f8c1fd4a269edd374b3830fe3
--- /dev/null
+++ b/blimp/client/app/android/java/src/org/chromium/blimp/input/ImeEditText.java
@@ -0,0 +1,42 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.blimp.input;
+
+import android.app.AlertDialog;
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.KeyEvent;
+import android.widget.EditText;
+
+/**
+ * A {@link EditText} that allows user to enter text into a web page.

[David Trainor- moved to gerrit, 2016/08/22 21:25:24]

This description seems a bit too specific, given that this class just is an
EditText that closes a parent dialog when KEYCODE_BACK is pressed.  Should we
make it more generic?

[shaktisahu, 2016/08/23 17:35:14]

:). Changed the description a bit. I think the class name itself is specific for
this purpose.

+ */
+public class ImeEditText extends EditText {
+    // The alert dialog that contains this text box.
+    private AlertDialog mParentDialog;
+
+    public ImeEditText(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    /**
+     * Sets the parent view for this view.
+     * @param dialog The dialog containing this view.
+     */
+    public void initialize(AlertDialog dialog) {
+        mParentDialog = dialog;
+    }
+
+    /**
+     * Dismiss the text input dialog as soon as back button is pressed.
+     */
+    @Override
+    public boolean dispatchKeyEventPreIme(KeyEvent event) {
+        if (event.getKeyCode() == KeyEvent.KEYCODE_BACK) {
+            mParentDialog.dismiss();

[David Trainor- moved to gerrit, 2016/08/22 21:25:24]

What's the current behavior with the back button?

[shaktisahu, 2016/08/23 17:35:14]

Currently, we hide the IME and make the EditText invisible. Also we go back to
"adjustNothing" option. Check WebInputBox.dispatchKeyEventPreIme.

[David Trainor- moved to gerrit, 2016/08/29 04:28:50]

I guess what I'm asking is does back on the phone currently dismiss the dialog? 
What does it do without this code?

[shaktisahu, 2016/08/29 18:58:47]

Oh.. Without this code, the phone takes two back presses to dismiss the dialog,
first one to close the IME and second one to dismiss the dialog. With this, it
will dismiss the IME and the dialog simultaneously.

+        }
+        return super.dispatchKeyEventPreIme(event);
+    }
+}