commit a5c10b42d565be39d3016fe63f3e565f114495f1
author Bo Liu <boliu@google.com> Mon Sep 23 09:21:36 2013 -0700
committer Bo Liu <boliu@google.com> Fri Oct 04 11:33:15 2013 -0700
tree 2fd5f1bf4f3a9f6c1c0652503d399dcc931934ba
parent 2e56ee96619645b751a272ade7757e7a0ee6ef31

Fork: Add setting to blend background with existing content

Cherry-pick of uncommitted https://codereview.chromium.org/23483051/ PS8

BUG: 10750978

If both base background color (WebView::setBaseBackgroundColor) and
background color (set by document) has alpha, then the background color
should be blended into existing content.

This behavior is important in Android WebView, which is a view inside
the  Android view tree and needs to blend with views below it.

Change-Id: Ica4cdeaa35b971b75ef1e664cd54f3fc7f95507a