Have you tried using aptitude instead of apt-get? It gives up less easily when trying to resolve issues such as these.
It tired, it really did...
Code:
The following packages have unmet dependencies:
libgles1-mesa : Depends: libglapi-mesa (= 10.3.0-0ubuntu2) but 10.4.0~git20140925.23247e80-0ubuntu0ricotz~trusty is installed.
The following actions will resolve these dependencies:
Keep the following packages at their current version:
1) libgles1-mesa [Not Installed]
2) vlc [Not Installed]
Accept this solution? [Y/n/q/?]