Use GLES2Interface for shader programs

cc/output/gl_renderer.h

Index: cc/output/gl_renderer.h
diff --git a/cc/output/gl_renderer.h b/cc/output/gl_renderer.h
index 895bccefc9ba5647c44d100259edd50740cea10f..834094337ca95e40e9dd378a9a65ccfe1970eb89 100644
--- a/cc/output/gl_renderer.h
+++ b/cc/output/gl_renderer.h
@@ -25,6 +25,12 @@ class SkBitmap;
 
 namespace blink { class WebGraphicsContext3D; }
 
+namespace gpu {
+namespace gles2 {
+class GLES2Interface;
+}
+}
+
 namespace cc {
 
 class GLRendererShaderTest;
@@ -403,6 +409,7 @@ class CC_EXPORT GLRenderer : public DirectRenderer {
   SolidColorProgramAA solid_color_program_aa_;
 
   blink::WebGraphicsContext3D* context_;
+  gpu::gles2::GLES2Interface* gl_;
   gpu::ContextSupport* context_support_;
 
   skia::RefPtr<GrContext> gr_context_;