The great shader refactor: Separate initialization from ctor

cc/output/gl_renderer.cc

Index: cc/output/gl_renderer.cc
diff --git a/cc/output/gl_renderer.cc b/cc/output/gl_renderer.cc
index c1937fd9d314f3883b208b7239ad4e06d802166c..ed790afcb55d3e9bc24b0113ddd4d15db1795478 100644
--- a/cc/output/gl_renderer.cc
+++ b/cc/output/gl_renderer.cc
@@ -3658,10 +3658,9 @@ const GLRenderer::VideoYUVProgram* GLRenderer::GetVideoYUVProgram(
                          [use_color_lut];
   if (!program->initialized()) {
     TRACE_EVENT0("cc", "GLRenderer::videoYUVProgram::initialize");
-    program->mutable_fragment_shader()->SetFeatures(use_alpha_plane, use_nv12,
-                                                    use_color_lut);
-    program->Initialize(output_surface_->context_provider(), precision,
-                        sampler);
+    program->InitializeVideoYUV(output_surface_->context_provider(), precision,
+                                sampler, use_alpha_plane, use_nv12,
+                                use_color_lut);
   }
   return program;
 }