Add support for color input datalist on Android

ui/android/java/res/drawable/color_button_background.xml

Index: ui/android/java/res/drawable/color_button_background.xml
diff --git a/ui/android/java/res/drawable/color_button_background.xml b/ui/android/java/res/drawable/color_button_background.xml
new file mode 100644
index 0000000000000000000000000000000000000000..e640ab7352d7ab83bba2df32630b1e966f59cd6b
--- /dev/null
+++ b/ui/android/java/res/drawable/color_button_background.xml
@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright 2013 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.
+-->
+
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+

[newt (away), 2013/10/09 06:07:03]

remove stray empty lines. this should look cleaner.

[keishi, 2013/10/15 16:44:02]

Done.

+    <item android:state_enabled="false">

[newt (away), 2013/10/09 06:07:03]

don't need a selector or this first item. as per the comment in
ColorSuggestionListAdapter, you should just hide the color button instead of
disabling it

[keishi, 2013/10/15 16:44:02]

Done.

+
+        <shape>
+
+            <solid android:color="#FFFFFF" />
+        </shape>
+    </item>
+    <item>
+
+        <layer-list>
+
+            <item android:top="0dp"

[newt (away), 2013/10/09 06:07:03]

top, right, left, and bottom are optional. you can leave them out when they're
just 0dp

[keishi, 2013/10/15 16:44:02]

Done.

+                android:right="0dp"
+                android:bottom="0dp"
+                android:left="0dp">
+
+                <shape android:shape="rectangle">
+
+                    <solid android:color="@color/color_picker_border_color"/>
+                </shape>
+            </item>
+
+            <item android:top="0dp"
+                android:right="1dp"
+                android:bottom="0dp"
+                android:left="0dp">
+
+                <shape android:shape="rectangle">
+
+                    <solid android:color="@color/color_picker_background_color"/>
+                </shape>
+            </item>
+
+            <item android:id="@+id/color_button_swatch"

[newt (away), 2013/10/09 06:07:03]

put each attribute on its own line:

    <item
        android:id="..."
        android:top="..."
        ...

[keishi, 2013/10/15 16:44:02]

Done.

+                android:top="1dp"
+                android:right="2dp"
+                android:bottom="1dp"
+                android:left="1dp">
+
+                <shape android:shape="rectangle">
+
+                    <solid android:color="#FF0000"/>
+                </shape>
+            </item>
+        </layer-list>
+    </item>
+</selector>