Use GLES2Interface for shader programs

cc/trees/layer_tree_host_impl_unittest.cc

Index: cc/trees/layer_tree_host_impl_unittest.cc
diff --git a/cc/trees/layer_tree_host_impl_unittest.cc b/cc/trees/layer_tree_host_impl_unittest.cc
index 19a11f90fff9639c5c30ebdc4e8d70755c028d4e..4b79df78abfb0634327fa01a5f0302dc96002d37 100644
--- a/cc/trees/layer_tree_host_impl_unittest.cc
+++ b/cc/trees/layer_tree_host_impl_unittest.cc
@@ -3624,10 +3624,6 @@ class MockContextHarness {
     EXPECT_CALL(*context_, drawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, 0))
         .WillOnce(Return())
         .RetiresOnSaturation();
-
-    EXPECT_CALL(*context_, useProgram(_))
-        .WillOnce(Return())
-        .RetiresOnSaturation();
   }
 
   void MustSetScissor(int x, int y, int width, int height) {
@@ -3924,8 +3920,6 @@ TEST_F(LayerTreeHostImplTest, HasTransparentBackground) {
 
   // Verify one quad is drawn when transparent background set is not set.
   host_impl_->active_tree()->set_has_transparent_background(false);
-  EXPECT_CALL(*mock_context, useProgram(_))
-      .Times(1);
   EXPECT_CALL(*mock_context, drawElements(_, _, _, _))
       .Times(1);
   LayerTreeHostImpl::FrameData frame;