reenable complexclip3 for gpu

src/gpu/GrClipMaskManager.cpp

Index: src/gpu/GrClipMaskManager.cpp
diff --git a/src/gpu/GrClipMaskManager.cpp b/src/gpu/GrClipMaskManager.cpp
index 7f85801d998e882d00a13bac98bbbd0b1ee9395f..4f08e4777408395e21e40ea4a6b96347d2d6b520 100644
--- a/src/gpu/GrClipMaskManager.cpp
+++ b/src/gpu/GrClipMaskManager.cpp
@@ -450,7 +450,11 @@ GrTexture* GrClipMaskManager::createTempMask(int width, int height) {
     desc.fFlags = kRenderTarget_GrSurfaceFlag;
     desc.fWidth = width;
     desc.fHeight = height;
-    desc.fConfig = kAlpha_8_GrPixelConfig;
+    if (this->getContext()->isConfigRenderable(kAlpha_8_GrPixelConfig, false)) {
+        desc.fConfig = kAlpha_8_GrPixelConfig;
+    } else {
+        desc.fConfig = kRGBA_8888_GrPixelConfig;
+    }
 
     return this->getContext()->refScratchTexture(desc, GrContext::kApprox_ScratchTexMatch);
 }