Remove GrSurface::isSameAs

src/gpu/GrSurface.cpp

Index: src/gpu/GrSurface.cpp
diff --git a/src/gpu/GrSurface.cpp b/src/gpu/GrSurface.cpp
index 1779f2441b46747cbc936cdc9c16d0eadc4311f2..1ca305b5a11080ea446db9b006e6424eb8b64e45 100644
--- a/src/gpu/GrSurface.cpp
+++ b/src/gpu/GrSurface.cpp
@@ -123,14 +123,3 @@ bool GrSurface::hasPendingIO() const {
     }
     return false;
 }
-
-bool GrSurface::isSameAs(const GrSurface* other) const {
-    const GrRenderTarget* thisRT = this->asRenderTarget();
-    if (thisRT) {
-        return thisRT == other->asRenderTarget();
-    } else {
-        const GrTexture* thisTex = this->asTexture();
-        SkASSERT(thisTex); // We must be one or the other
-        return thisTex == other->asTexture();
-    }
-}