Remove never_lint from WebView

build/android/lint/suppressions.xml

 <?xml version="1.0" encoding="utf-8"?>
 <lint>
   <!--
 STOP! It looks like you want to suppress some lint errors:
 - Have you tried identifing the offending patch?
   Ask the author for a fix and/or revert the patch.
 - It is preferred to add suppressions in the code instead of
   sweeping it under the rug here. See:
 
     http://developer.android.com/tools/debugging/improving-w-lint.html
@@ skipping 23 matching lines @@
   <issue id="DrawAllocation">
     <ignore path="content/public/android/java/src/org/chromium/content/browser/ContentViewRenderView.java"/>
     <ignore path="content/public/android/java/src/org/chromium/content/browser/PopupZoomer.java"/>
   </issue>
   <issue id="ExportedContentProvider">
     <ignore path="AndroidManifest.xml"/>
   </issue>
   <issue id="HandlerLeak">
     <ignore path="remoting/android/java/src/org/chromium/chromoting/TapGestureDetector.java"/>
   </issue>
+  <issue id="IconMissingDensityFolder">
+    <!-- see crbug.com/542435 -->
+    <ignore regexp="ic_play_circle_outline_black_48dp.png" />

[newt (away), 2015/10/13 21:50:57]

Make sure this regex won't cause other assets with missing densities to be
ignored. In particular you may need to add ": " at the beginning and "$" at the
end of the regex.

[michaelbai, 2015/10/13 22:03:48]

Done.

+  </issue>
   <issue id="IconDensities">
     <!-- crbug.com/457918 is tracking missing assets -->
     <ignore path="components/web_contents_delegate_android/android/java/res/drawable-xxhdpi"/>
     <ignore path="components/web_contents_delegate_android/android/java/res/drawable-xxxhdpi"/>
     <ignore path="content/public/android/java/res/drawable-xxhdpi"/>
     <ignore path="content/public/android/java/res/drawable-xxxhdpi"/>
     <ignore path="chrome/android/java/res/drawable-xxhdpi"/>
     <ignore path="chrome/android/java/res/drawable-xxxhdpi"/>
     <ignore path="ui/android/java/res/drawable-xxhdpi"/>
     <ignore path="ui/android/java/res/drawable-xxxhdpi"/>
@@ skipping 47 matching lines @@
     <ignore path="content/shell/android/shell_apk/res/values/strings.xml" />
   </issue>
   <issue id="SignatureOrSystemPermissions" severity="ignore"/>
   <issue id="UnusedAttribute" severity="ignore"/>
   <issue id="ViewConstructor" severity="ignore"/>
   <issue id="WrongCall" severity="ignore"/>
   <issue id="UselessParent">
     <ignore path="chrome/android/java/res/layout/data_reduction_promo_screen.xml" />
   </issue>
 </lint>