Enable disabling WebCore::GraphicsContext in telemetry.

cc/test/solid_color_content_layer_client.cc

Index: cc/test/solid_color_content_layer_client.cc
diff --git a/cc/test/solid_color_content_layer_client.cc b/cc/test/solid_color_content_layer_client.cc
index c61f85589a6031b2e6454544dfe0af9efa242b26..8c9de1c1f33f8c782832a5a2193856d275cf6dc0 100644
--- a/cc/test/solid_color_content_layer_client.cc
+++ b/cc/test/solid_color_content_layer_client.cc
@@ -12,9 +12,10 @@
 namespace cc {
 
 void SolidColorContentLayerClient::PaintContents(
-    SkCanvas* canvas, const gfx::Rect& rect, gfx::RectF* opaque_rect) {
-  if (!canvas)
-    return;
+    SkCanvas* canvas,
+    const gfx::Rect& rect,
+    gfx::RectF* opaque_rect,
+    ContentLayerClient::GraphicsContextStatus gc_status) {
   SkPaint paint;
   paint.setStyle(SkPaint::kFill_Style);
   paint.setColor(color_);