Use larger vector graphics for special tiles and fix selection ring.

chrome/android/java/res/drawable/ic_photo_camera600_48dp.xml

Index: chrome/android/java/res/drawable/ic_photo_camera600_48dp.xml
diff --git a/chrome/android/java/res/drawable/ic_photo_camera600_48dp.xml b/chrome/android/java/res/drawable/ic_photo_camera600_48dp.xml
new file mode 100644
index 0000000000000000000000000000000000000000..bfe3446a6fe19429383b09465df9f067e62d115b
--- /dev/null
+++ b/chrome/android/java/res/drawable/ic_photo_camera600_48dp.xml
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright 2017 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. -->
+
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    tools:targetApi="21"
+    android:width="48dp"
+    android:height="48dp"
+    android:viewportWidth="48"
+    android:viewportHeight="48">
+
+    <path
+        android:fillColor="@color/google_grey_600"
+        android:pathData="M 24 17.6 C 27.5346223989 17.6 30.4 20.4653776011 30.4 24 C 30.4 27.5346223989 27.5346223989 30.4 24 30.4 C 20.4653776011 30.4 17.6 27.5346223989 17.6 24 C 17.6 20.4653776011 20.4653776011 17.6 24 17.6 Z" />
+    <path
+        android:fillColor="@color/google_grey_600"
+        android:pathData="M18 4l-3.66 4H8c-2.21 0-4 1.79-4 4v24c0 2.21 1.79 4 4 4h32c2.21 0 4-1.79
+4-4V12c0-2.21-1.79-4-4-4h-6.34L30 4H18zm6 30c-5.52 0-10-4.48-10-10s4.48-10 10-10
+10 4.48 10 10-4.48 10-10 10z" />
+    <path
+        android:pathData="M0 0h48v48H0z" />
+</vector>