Minor optimization

https://codereview.chromium.org/14495006/



git-svn-id: http://skia.googlecode.com/svn/trunk@8912 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp
index 84ad1d3..ab24072 100644
--- a/src/gpu/GrContext.cpp
+++ b/src/gpu/GrContext.cpp
@@ -781,7 +781,7 @@
     GrDrawTarget* target = this->prepareToDraw(&paint, BUFFERED_DRAW);
     GrDrawState::AutoStageDisable atr(fDrawState);
 
-    GrRect devRect = rect;
+    GrRect devRect;
     SkMatrix combinedMatrix;
     bool useVertexCoverage;
     bool needAA = paint.isAntiAlias() &&