Remove GrIsPow2 in favor of SkIsPow2.

include/gpu/GrTexture.h

Index: include/gpu/GrTexture.h
diff --git a/include/gpu/GrTexture.h b/include/gpu/GrTexture.h
index 0f7fe9ea2f33cc76133a75704d57cef9d8172bf1..047bd18186ef3b135cef6782a821df1bfa49661a 100644
--- a/include/gpu/GrTexture.h
+++ b/include/gpu/GrTexture.h
@@ -47,11 +47,11 @@ public:
      * new callsites for these functions. They are slated for removal.
      */
     SkFixed normalizeFixedX(SkFixed x) const {
-        SkASSERT(GrIsPow2(fDesc.fWidth));
+        SkASSERT(SkIsPow2(fDesc.fWidth));
         return x >> fShiftFixedX;
     }
     SkFixed normalizeFixedY(SkFixed y) const {
-        SkASSERT(GrIsPow2(fDesc.fHeight));
+        SkASSERT(SkIsPow2(fDesc.fHeight));
         return y >> fShiftFixedY;
     }