Move some auto restore helpers from GrDrawTarget to GrDrawState.

R=robertphillips@google.com

git-svn-id: http://skia.googlecode.com/svn/trunk@5846 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrSoftwarePathRenderer.cpp b/src/gpu/GrSoftwarePathRenderer.cpp
index edac161..a2c5867 100644
--- a/src/gpu/GrSoftwarePathRenderer.cpp
+++ b/src/gpu/GrSoftwarePathRenderer.cpp
@@ -75,7 +75,7 @@
 void draw_around_inv_path(GrDrawTarget* target,
                           const GrIRect& devClipBounds,
                           const GrIRect& devPathBounds) {
-    GrDrawTarget::AutoDeviceCoordDraw adcd(target);
+    GrDrawState::AutoDeviceCoordDraw adcd(target->drawState());
     if (!adcd.succeeded()) {
         return;
     }