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

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

Index: tools/clang/rewrite_to_chrome_style/tests/functions-original.cc
diff --git a/tools/clang/rewrite_to_chrome_style/tests/functions-original.cc b/tools/clang/rewrite_to_chrome_style/tests/functions-original.cc
index 14530c6570af943f1a6321c360e97ce1bc7fef05..571096f3156d38fab8832879d512a7bf9f93045f 100644
--- a/tools/clang/rewrite_to_chrome_style/tests/functions-original.cc
+++ b/tools/clang/rewrite_to_chrome_style/tests/functions-original.cc
@@ -36,8 +36,12 @@ void F() {
   int (*functionPointer)(int, int) = &testFunctionThatTakesTwoInts;
 }
 
+void bug640688();  // Declaration within blink namespace.
+
 }  // namespace blink
 
+void blink::bug640688() {}  // Definition outside of blink namespace.
+
 using blink::testFunctionThatTakesTwoInts;
 
 void G() {