cc: Only show GPU status if fps or paint time is up

The GPU status is currently showing if "Show paint rectangles" or
"Show potential scroll bottlenecks" is up, but was only meant to
be displayed for the fps and paint time meters.

This was caused by my previous change:
https://codereview.chromium.org/774943005

BUG=

Review URL: https://codereview.chromium.org/805293002

Cr-Commit-Position: refs/heads/master@{#308610}

cc/layers/heads_up_display_layer_impl.cc

@@ -279,8 +279,10 @@ void HeadsUpDisplayLayerImpl::DrawHudContents(SkCanvas* canvas) {
         DrawFPSDisplay(canvas, layer_tree_impl()->frame_rate_counter(), 0, 0);
   }
 
-  area = DrawGpuRasterizationStatus(canvas, 0, area.bottom(),
-                                    SkMaxScalar(area.width(), 150));
+  if (debug_state.show_fps_counter || debug_state.continuous_painting) {
+    area = DrawGpuRasterizationStatus(canvas, 0, area.bottom(),
+                                      SkMaxScalar(area.width(), 150));
+  }
 
   if (debug_state.ShowMemoryStats())
     DrawMemoryDisplay(canvas, 0, area.bottom(), SkMaxScalar(area.width(), 150));