Remove unnecessary dirty clip flag in GrGpu, remove getUsableStencilBits()

Review URL: http://codereview.appspot.com/4828050/



git-svn-id: http://skia.googlecode.com/svn/trunk@2011 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu/src/GrDrawTarget.cpp b/gpu/src/GrDrawTarget.cpp
index f1f1136..ad066d8 100644
--- a/gpu/src/GrDrawTarget.cpp
+++ b/gpu/src/GrDrawTarget.cpp
@@ -792,6 +792,10 @@
     }
     return layout;
 }
+
+void GrDrawTarget::clipWillBeSet(const GrClip& clip) {
+}
+
 void GrDrawTarget::SetRectVertices(const GrRect& rect,
                                    const GrMatrix* matrix, 
                                    const GrRect* srcRects[],