Tweak |in_blink_namespace|, to look at ancestors *and also* at qualifiers.

tools/clang/rewrite_to_chrome_style/tests/functions-expected.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 namespace blink {
 
 // Tests that the prototype for a function is updated.
 int TestFunctionThatTakesTwoInts(int x, int y);
 // Overload to test using declarations that introduce multiple shadow
 // declarations.
@@ skipping 18 matching lines @@
 
 // swap() functions are not renamed.
 void swap(SwapType& a, SwapType& b) {}
 
 // Note: F is already Google style and should not change.
 void F() {
   // Test referencing a function without calling it.
   int (*function_pointer)(int, int) = &TestFunctionThatTakesTwoInts;
 }
 
+void Bug640688();  // Declaration within blink namespace.
+
 }  // namespace blink
 
+void blink::Bug640688() {}  // Definition outside of blink namespace.
+
 using blink::TestFunctionThatTakesTwoInts;
 
 void G() {
   TestFunctionThatTakesTwoInts(1, 2);
 
   blink::SwapType a, b;
   swap(a, b);
 }