Add test configs for instanced rendering

Adds the following configs and enables them on select bots:

  glinst, glinst4, glinstdit4, glinst16, glinstdit16,
  esinst, esinst4, esinstdit4

Makes general changes to GrContextOptions, GrCaps, etc. to facilitate
this.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2182783004

Review-Url: https://codereview.chromium.org/2182783004

1 files changed, 10 insertions, 2 deletions

diff --git a/src/gpu/instanced/GLInstancedRendering.h b/src/gpu/instanced/GLInstancedRendering.h
index 3b87b0485a..4e17cb4535 100644
--- a/src/gpu/instanced/GLInstancedRendering.h
+++ b/src/gpu/instanced/GLInstancedRendering.h
@@ -8,9 +8,11 @@
 #ifndef gr_instanced_GLInstancedRendering_DEFINED
 #define gr_instanced_GLInstancedRendering_DEFINED
 
+#include "GrCaps.h"
 #include "gl/GrGLBuffer.h"
 #include "instanced/InstancedRendering.h"
 
+class GrGLCaps;
 class GrGLGpu;
 
 #define GR_GL_LOG_INSTANCED_BATCHES 0
@@ -19,11 +21,15 @@ namespace gr_instanced {
 
 class GLInstancedRendering final : public InstancedRendering {
 public:
-    static GLInstancedRendering* CreateIfSupported(GrGLGpu*);
+    GLInstancedRendering(GrGLGpu*);
     ~GLInstancedRendering() override;
 
 private:
-    GLInstancedRendering(GrGLGpu*, AntialiasMode lastSupportedAAMode);
+    /**
+     * Called by GrGLCaps to determine the level of support this class can offer for instanced
+     * rendering on the current platform.
+     */
+    static GrCaps::InstancedSupport CheckSupport(const GrGLCaps&);
 
     GrGLGpu* glGpu() const;
 
@@ -52,6 +58,8 @@ private:
 
     class GLBatch;
 
+    friend class ::GrGLCaps; // For CheckSupport.
+
     typedef InstancedRendering INHERITED;
 };