android_webview: Remove obsolete files from whitelist.

This removes two obsolete files (they don't exist anymore) from
the whitelist used by the third-party license verification tool
for the Android webview.

BUG=NONE
R=torne@chromium.org,joth@chromium.org

Review URL: https://codereview.chromium.org/32723002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@229860 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 229860
Fix the browser crash that occurred in RendererResource. This was caused by r129574, since that made it possible for background pages opened by window.open switch RenderViewHosts. BackgroundContentsResourceProvider just needs to be updated to handle this case, similar to TabContentsResourceProvider.

With this fix, we can remove the temporary code added in r186502 as part of removing RenderViewHostObserver.

BUG=306569,165138
R=creis@chromium.org

Review URL: https://codereview.chromium.org/29693009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@229862 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 229862