change isNestedRect to isNestedFillRect

R=reed@google.com, bsalomon@google.com

Let isNested(Fill)Rect return true if drawn path describes filled
rectangles.

Review URL: https://codereview.chromium.org/1073473002
diff --git a/src/utils/SkLua.cpp b/src/utils/SkLua.cpp
index 84932cd..11d9b29 100644
--- a/src/utils/SkLua.cpp
+++ b/src/utils/SkLua.cpp
@@ -1495,10 +1495,10 @@
     return gStr[dir];
 }
 
-static int lpath_isNestedRects(lua_State* L) {
+static int lpath_isNestedFillRects(lua_State* L) {
     SkRect rects[2];
     SkPath::Direction dirs[2];
-    bool pred = get_obj<SkPath>(L, 1)->isNestedRects(rects, dirs);
+    bool pred = get_obj<SkPath>(L, 1)->isNestedFillRects(rects, dirs);
     int ret_count = 1;
     lua_pushboolean(L, pred);
     if (pred) {
@@ -1562,7 +1562,7 @@
     { "isConvex", lpath_isConvex },
     { "isEmpty", lpath_isEmpty },
     { "isRect", lpath_isRect },
-    { "isNestedRects", lpath_isNestedRects },
+    { "isNestedFillRects", lpath_isNestedFillRects },
     { "countPoints", lpath_countPoints },
     { "reset", lpath_reset },
     { "moveTo", lpath_moveTo },