[Contextual Search] Add support for crushed sprites and animate the search provider icon

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 35 matching lines @@
     <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"/>
     <ignore regexp=".*: data_reduction_illustration.png, reader_mode_bar_background.9.png, tabs_moved_htc.png, tabs_moved_nexus.png, tabs_moved_samsung.png$"/>
   </issue>
+  <issue id="IconDipSize">
+    <ignore path="chrome/android/java/res/drawable-mdpi"/>

[newt (away), 2015/09/25 01:21:27]

nooooooooo :'(  *tears*

We don't want to ignore all IconDipSize warnings-- just the ones related to
google_icon_sprite.png. The <ignore regexp="..."> line should be sufficient for
that purpose. So, why do you need all the <ignore path="..."> lines?

[Theresa, 2015/09/25 01:52:08]

I had assumed (based on nothing) it used both the path and regexp (which was
incorrect anyway). Fixed the regexp and removed the paths.

Is the new regexp specific enough? This is the warning message:

chrome/android/java/res/drawable-mdpi/google_icon_sprite.png The image
`google_icon_sprite.png` varies significantly in its density-independent (dip)
size across the various density versions:
drawable-xxhdpi/google_icon_sprite.png: 283x36 dp (849x108 px),
drawable-xxxhdpi/google_icon_sprite.png: 281x36 dp (1124x144 px),
drawable-xhdpi/google_icon_sprite.png: 90x102 dp (180x203 px),
drawable-hdpi/google_icon_sprite.png: 85x100 dp (128x150 px),
drawable-mdpi/google_icon_sprite.png: 77x94 dp (77x94 px): IconDipSize [warning]

+    <ignore path="chrome/android/java/res/drawable-hdpi"/>
+    <ignore path="chrome/android/java/res/drawable-xhdpi"/>
+    <ignore path="chrome/android/java/res/drawable-xxhdpi"/>
+    <ignore path="chrome/android/java/res/drawable-xxxhdpi"/>
+    <ignore regexp=".*: google_icon_sprite.png$"/>
+  </issue>
   <issue id="IconLocation">
     <!-- It is OK for content_shell_apk to have missing assets. -->
     <ignore path="content/shell/android/java/res/"/>
     <!-- Suppression for chrome/test/chromedriver/test/webview_shell/java/res/drawable/icon.png -->
     <ignore path="res/drawable/icon.png"/>
     <!-- TODO(lambroslambrou) remove this once crbug.com/502030 is fixed. -->
     <ignore path="remoting/android/java/res"/>
   </issue>
   <issue id="InconsistentLayout" severity="ignore"/>
   <issue id="InflateParams" severity="ignore"/>
@@ skipping 35 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>