move all code generation under genProgram() in GrGLShaderBuilder.

R=robertphillips@google.com, jvanverth@google.com

Author: bsalomon@google.com

Review URL: https://codereview.chromium.org/306063002

git-svn-id: http://skia.googlecode.com/svn/trunk/src@14996 2bbb7eff-a529-9590-31e7-b0007b416f81
2 files changed