Make GrTextureStripAtlas flush pending IO on newly acquired texture

src/gpu/effects/GrTextureStripAtlas.cpp

Index: src/gpu/effects/GrTextureStripAtlas.cpp
diff --git a/src/gpu/effects/GrTextureStripAtlas.cpp b/src/gpu/effects/GrTextureStripAtlas.cpp
index 1543a2e9dbed65129e21a2b78083f1c3378b3ad6..2c882508f5f9dfb7d4d86b81b9dbaee80d7c9e15 100644
--- a/src/gpu/effects/GrTextureStripAtlas.cpp
+++ b/src/gpu/effects/GrTextureStripAtlas.cpp
@@ -209,6 +209,10 @@ void GrTextureStripAtlas::lockTexture() {
         if (!fTexture) {
             return;
         }
+
+        // We will be issuing writes to the surface using kDontFlush_PixelOpsFlag, so we
+        // need to make sure any existing IO is flushed
+        fDesc.fContext->flushSurfaceIO(fTexture);
         fDesc.fContext->textureProvider()->assignUniqueKeyToTexture(key, fTexture);
         // This is a new texture, so all of our cache info is now invalid
         this->initLRU();