Move GLSurface and rename source files.

Move the GLSurface implementations for Ozone from //ui/gl to
//ui/gl/init as part of breaking the dependency from //ui/gl on
//ui/ozone. These classes will later be refactored and moved back to
//ui/gl without any Ozone dependencies.

Also rename the files that contain the platform specific implementation
of GetPlatformDefaultEGLNativeDisplay() to be more appropriate.

BUG=611142

Review-Url: https://codereview.chromium.org/2088453003
Cr-Commit-Position: refs/heads/master@{#401093}
14 files changed