Allow blitting to a render texture in BlitFramebuffer.

Change the type check to allow blitting between render buffers and render textures. Store the format for render textures so that resolving to a render texture Colorbuffer will pass the format check.

BUG=37

Review URL: http://codereview.appspot.com/2205043

git-svn-id: http://angleproject.googlecode.com/svn/trunk@430 736b8ea6-26fd-11df-bfd4-992fa37f6226
5 files changed