Readd "immediate" mode

src/gpu/GrTest.cpp

Index: src/gpu/GrTest.cpp
diff --git a/src/gpu/GrTest.cpp b/src/gpu/GrTest.cpp
index 2889e9709e08661c8b6b8d39b0c5f77ac7fa0c87..19c093a7b1a7227d20509afde79ca4e937293347 100644
--- a/src/gpu/GrTest.cpp
+++ b/src/gpu/GrTest.cpp
@@ -300,7 +300,7 @@ void GrContext::initMockContext() {
     SkASSERT(nullptr == fGpu);
     fGpu = new MockGpu(this, options);
     SkASSERT(fGpu);
-    this->initCommon(options);
+    this->initCommon();
 
     // We delete these because we want to test the cache starting with zero resources. Also, none of
     // these objects are required for any of tests that use this context. TODO: make stop allocating