Add ES 3.0 fallback for instanced rendering

src/gpu/GrCaps.cpp

Index: src/gpu/GrCaps.cpp
diff --git a/src/gpu/GrCaps.cpp b/src/gpu/GrCaps.cpp
index fa4230f9fce49b09a9bdb3e926f298099a6e0def..33c22be9a01207c21c9399d3196ce842683e0e92 100644
--- a/src/gpu/GrCaps.cpp
+++ b/src/gpu/GrCaps.cpp
@@ -99,7 +99,6 @@ GrCaps::GrCaps(const GrContextOptions& options) {
     fMultisampleDisableSupport = false;
     fUsesMixedSamples = false;
     fPreferClientSideDynamicBuffers = false;
-    fSupportsInstancedDraws = false;
     fFullClearIsFree = false;
     fMustClearUploadedBufferData = false;
     fSampleShadingSupport = false;
@@ -181,7 +180,6 @@ SkString GrCaps::dump() const {
     r.appendf("Multisample disable support        : %s\n", gNY[fMultisampleDisableSupport]);
     r.appendf("Uses Mixed Samples                 : %s\n", gNY[fUsesMixedSamples]);
     r.appendf("Prefer client-side dynamic buffers : %s\n", gNY[fPreferClientSideDynamicBuffers]);
-    r.appendf("Supports instanced draws           : %s\n", gNY[fSupportsInstancedDraws]);
     r.appendf("Full screen clear is free          : %s\n", gNY[fFullClearIsFree]);
     r.appendf("Must clear buffer memory           : %s\n", gNY[fMustClearUploadedBufferData]);
     r.appendf("Draw Instead of Clear [workaround] : %s\n", gNY[fUseDrawInsteadOfClear]);