resources: Optimize the resources in component/resources.

BUG=none
R=oshima@chromium.org

Review URL: https://codereview.chromium.org/509093003

Cr-Commit-Position: refs/heads/master@{#292469}

tools/resources/optimize-png-files.sh

@@ -22,6 +22,7 @@ chrome/android/java/res
 chrome/app/theme
 chrome/browser/resources
 chrome/renderer/resources
+component/resources
 content/public/android/java/res
 content/app/resources
 content/renderer/resources