[Payments] Float card scanner icon at the end of EditText instead of compound drawable

chrome/android/java/res/layout/payments_request_editor_textview.xml

Index: chrome/android/java/res/layout/payments_request_editor_textview.xml
diff --git a/chrome/android/java/res/layout/payments_request_editor_textview.xml b/chrome/android/java/res/layout/payments_request_editor_textview.xml
index db89d5b0d4e4e0e6e5f62b0c0cd72f79b1f80df2..ec5ba08f0ecc1ef92089059809439e13f4a9bff5 100644
--- a/chrome/android/java/res/layout/payments_request_editor_textview.xml
+++ b/chrome/android/java/res/layout/payments_request_editor_textview.xml
@@ -3,10 +3,30 @@
      Use of this source code is governed by a BSD-style license that can be
      found in the LICENSE file. -->
 
-<AutoCompleteTextView
+<FrameLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
-    android:id="@+id/text_view"
     android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:singleLine="true"
-    android:imeOptions="flagNoExtractUi" />
+    android:layout_height="wrap_content">
+
+    <org.chromium.chrome.browser.widget.CompatibilityTextInputLayout

[Ted C, 2016/10/21 17:50:43]

what happens if this text is very long?  Won't the icon overlap it and
potentially prevent it from being visible?

I feel this needs android:paddingEnd="48dp" or something to ensure that isn't
the case.

[gogerald1, 2016/10/21 20:01:34]

Done. Add padding programmatically in EditorTextField.onWindowFocusChanged when
action_icon is enabled.

+        android:id="@+id/text_input_layout"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
+
+        <AutoCompleteTextView
+            android:id="@+id/text_view"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:singleLine="true"
+            android:imeOptions="flagNoExtractUi" />
+    </org.chromium.chrome.browser.widget.CompatibilityTextInputLayout>
+
+    <ImageView
+        android:id="@+id/action_icon"
+        android:layout_width="48dp"
+        android:layout_height="48dp"
+        android:padding="12dp"
+        android:layout_gravity="end"
+        android:contentDescription="@null"
+        android:visibility="gone"/>
+</FrameLayout>