Use first or internal display as source for software based mirroring.

Existing code works fine for daisy as daisy reports no EDID for internal display.

BUG=292891

Review URL: https://codereview.chromium.org/20267002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227446 0039d316-1c4b-4281-b951-d872f2087c98
[FileAPI] Correct FileSystemMsg_Remove naming

 * Renaming FileSystemMsg_Remove to FileSystemHostMsg_Remove.

Review URL: https://codereview.chromium.org/25453007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227447 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227447