What is the current elevation of snippets?

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/84ee518a8941b23498f9c3dc6c5421808143c855

commit 84ee518a8941b23498f9c3dc6c5421808143c855
Author: mcwilliams <mcwilliams@chromium.org>
Date: Wed May 18 21:58:24 2016

Adding elevation to NTP snippets

Add elevation to the snippet cards so the peeking card is more prominent and the last snippet has elevation especially when you dismiss cards and when there is a space between the last snippet and the bottom of the screen

Video: https://drive.google.com/open?id=0B1IgAIJ9cgizb2FWM29QU1JSSU0

BUG= 611974 ,  611445 

Review-Url: https://codereview.chromium.org/1995433003
Cr-Commit-Position: refs/heads/master@{#394563}

[modify] https://crrev.com/84ee518a8941b23498f9c3dc6c5421808143c855/base/android/java/src/org/chromium/base/ApiCompatibilityUtils.java
[delete] https://crrev.com/2c30f24ecc1c52d3dcadf4c6025b6f8f14f426af/chrome/android/java/res/drawable/snippet_separator.xml
[modify] https://crrev.com/84ee518a8941b23498f9c3dc6c5421808143c855/chrome/android/java/res/values/colors.xml
[modify] https://crrev.com/84ee518a8941b23498f9c3dc6c5421808143c855/chrome/android/java/res/values/dimens.xml
[modify] https://crrev.com/84ee518a8941b23498f9c3dc6c5421808143c855/chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageLayout.java
[modify] https://crrev.com/84ee518a8941b23498f9c3dc6c5421808143c855/chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageView.java
[modify] https://crrev.com/84ee518a8941b23498f9c3dc6c5421808143c855/chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetItemDecoration.java

 Issue 611769  has been merged into this issue.