Remove an unused mRenderer member from Program and initialize TF members.

BUG=angle:731

Change-Id: Ie11c80ce1f3a8c3d08145dfb4a075ac0e022ae38
Reviewed-on: https://chromium-review.googlesource.com/239218
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>
diff --git a/src/libANGLE/Program.cpp b/src/libANGLE/Program.cpp
index 026e19b..218d3f6 100644
--- a/src/libANGLE/Program.cpp
+++ b/src/libANGLE/Program.cpp
@@ -191,6 +191,8 @@
 Program::Program(rx::ProgramImpl *impl, ResourceManager *manager, GLuint handle)
     : mProgram(impl),
       mValidated(false),
+      mTransformFeedbackVaryings(),
+      mTransformFeedbackBufferMode(GL_NONE),
       mFragmentShader(NULL),
       mVertexShader(NULL),
       mLinked(false),