Allow copying and viewing account credentials in PasswordEntryEditor

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

Index: chrome/android/java/res/layout/password_entry_editor_interactive.xml
diff --git a/chrome/android/java/res/layout/password_entry_editor_interactive.xml b/chrome/android/java/res/layout/password_entry_editor_interactive.xml
index 4b5540160f013c40c98133371bfe205d8d9c8f18..c8567318064819fb052a16a0b313b5ba6ddf5484 100644
--- a/chrome/android/java/res/layout/password_entry_editor_interactive.xml
+++ b/chrome/android/java/res/layout/password_entry_editor_interactive.xml
@@ -13,8 +13,7 @@
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:orientation="vertical"
-        android:title="@string/password_entry_editor_title" 
-        android:visibility="gone">
+        android:title="@string/password_entry_editor_title">
         
         <TextView
             android:text="@string/password_entry_editor_site_title"
@@ -46,7 +45,9 @@
                 android:layout_weight="1" />
         
             <ImageButton
+                android:id="@+id/password_entry_editor_copy_site"
                 style="?android:attr/buttonStyleSmall"
+                android:background="@color/white_icon_background"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:layout_gravity="end"
@@ -88,7 +89,9 @@
                 android:layout_weight="1" />
         
             <ImageButton
+                android:id="@+id/password_entry_editor_copy_username"
                 style="?android:attr/buttonStyleSmall"
+                android:background="@color/white_icon_background"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:layout_gravity="end"
@@ -120,6 +123,7 @@
                 android:layout_height="wrap_content"
                 android:layout_marginTop="10dp"
                 android:layout_marginStart="15dp"
+                android:inputType="textPassword"
                 android:textAppearance="?android:attr/textAppearanceMedium" />
             
             <View
@@ -128,6 +132,8 @@
                 android:layout_weight="1" />
             
             <ImageButton
+                android:id="@+id/password_entry_editor_view_password"
+                android:background="@color/white_icon_background"
                 style="?android:attr/buttonStyleSmall"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
@@ -138,6 +144,8 @@
                 android:contentDescription="@string/password_entry_editor_view_stored_password" />
         
             <ImageButton
+                android:id="@+id/password_entry_editor_copy_password"
+                android:background="@color/white_icon_background"
                 style="?android:attr/buttonStyleSmall"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"