Add abliity to set textblob cache budget to GrContext

src/gpu/GrTest.cpp

Index: src/gpu/GrTest.cpp
diff --git a/src/gpu/GrTest.cpp b/src/gpu/GrTest.cpp
index ce98aa764ba11182a87f2911ea6a900c554b36ec..da502732b13aa68cb09450ed6f3fd074583383cb 100644
--- a/src/gpu/GrTest.cpp
+++ b/src/gpu/GrTest.cpp
@@ -30,6 +30,10 @@ void GrContext::getTestTarget(GrTestTarget* tar) {
     tar->init(this, fDrawingMgr.fDrawTarget);
 }
 
+void GrContext::setTextBlobCacheLimit_ForTesting(size_t bytes) {
+    fTextBlobCache->setBudget(bytes);
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 
 void GrContext::purgeAllUnlockedResources() {