Convert SkMatrix::I() assignments to SkMatrix::reset() calls



git-svn-id: http://skia.googlecode.com/svn/trunk@3441 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrAAHairLinePathRenderer.cpp b/src/gpu/GrAAHairLinePathRenderer.cpp
index f24ce7b..3e5a1fa 100644
--- a/src/gpu/GrAAHairLinePathRenderer.cpp
+++ b/src/gpu/GrAAHairLinePathRenderer.cpp
@@ -618,7 +618,7 @@
         if (drawState->getViewInverse(&ivm)) {
             drawState->preConcatSamplerMatrices(stageMask, ivm);
         }
-        drawState->setViewMatrix(GrMatrix::I());
+        drawState->viewMatrix()->reset();
     }
 
     // TODO: See whether rendering lines as degenerate quads improves perf