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

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

Index: chrome/android/java/res/layout/photo_picker_bitmap_view.xml
diff --git a/chrome/android/java/res/layout/photo_picker_bitmap_view.xml b/chrome/android/java/res/layout/photo_picker_bitmap_view.xml
index 01718226172e79a6f466476dfbc2bca3bfa3b850..1a95d5451ebb37520d75d62a4fd86d4427404224 100644
--- a/chrome/android/java/res/layout/photo_picker_bitmap_view.xml
+++ b/chrome/android/java/res/layout/photo_picker_bitmap_view.xml
@@ -32,14 +32,13 @@
             android:visibility="gone" />
     </FrameLayout>
 
-    <ImageView
+    <View

[Theresa, 2017/05/04 15:27:13]

I think this and the View below should be ImageViews unless that doesn't work
for some reason.

         android:id="@+id/selected"
-        android:layout_width="24dp"
-        android:layout_height="24dp"
-        android:layout_marginStart="4dp"
-        android:layout_marginTop="4dp"
-        android:contentDescription="@null"
-        android:src="@drawable/verify_checkmark"
+        android:layout_width="26dp"
+        android:layout_height="26dp"
+        android:layout_marginStart="2dp"
+        android:layout_marginTop="2dp"
+        android:background="@drawable/checkmark_blue"
         android:visibility="gone" />
 
     <View
@@ -52,17 +51,33 @@
         android:visibility="gone" />
 
     <!-- Special tiles, that give access to the camera and gallery  -->
-    <TextView
+    <LinearLayout
         android:id="@+id/special_tile"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_marginTop="@dimen/photo_picker_label_gap"
-        android:drawablePadding="10dp"
-        android:fontFamily="sans-serif-medium"
-        android:textStyle="bold"
-        android:textSize="14sp"
-        android:textAllCaps="true"
-        android:textColor="@color/photo_picker_special_tile_color"
+        android:orientation="vertical"
+        android:layout_gravity="center"
         android:gravity="center"
-        android:layout_gravity="center" />
+        android:visibility="gone">
+
+        <ImageView
+            android:id="@+id/special_tile_icon"
+            android:adjustViewBounds="true"
+            android:layout_width="48dp"
+            android:layout_height="48dp"
+            android:contentDescription="@null"
+            android:tint="@color/photo_picker_special_tile_color" />
+
+        <TextView
+            android:id="@+id/special_tile_label"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="@dimen/photo_picker_label_gap"
+            android:fontFamily="sans-serif-medium"
+            android:gravity="center"
+            android:textStyle="bold"
+            android:textSize="14sp"
+            android:textAllCaps="true"
+            android:textColor="@color/photo_picker_special_tile_color" />
+    </LinearLayout>
 </view>