Don't rename references to functions that originate from template args.

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

Index: tools/clang/rewrite_to_chrome_style/tests/template-original.cc
diff --git a/tools/clang/rewrite_to_chrome_style/tests/template-original.cc b/tools/clang/rewrite_to_chrome_style/tests/template-original.cc
index 39ae4e5efbf726abe3dfc5e29cea2c4a5a138ff8..cb2251765dfe2ade768a635bed6f08dee4d51f74 100644
--- a/tools/clang/rewrite_to_chrome_style/tests/template-original.cc
+++ b/tools/clang/rewrite_to_chrome_style/tests/template-original.cc
@@ -2,6 +2,20 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+namespace not_blink {
+
+void notBlinkFunction(int x) {}
+
+class NotBlinkClass {
+ public:
+  void notBlinkMethod() {}
+};
+
+template <typename T>
+void notBlinkFunctionTemplate(T x) {}
+
+}  // not_blink
+
 namespace blink {
 
 template <typename T, int number>
@@ -20,4 +34,68 @@ void F() {
   const int is_a_const = number;
 }
 
+namespace test_template_arg_is_function {
+
+void f(int x) {}
+
+template <typename T, void g(T)>
+void h(T x) {
+  g(x);
+}
+
+void test() {
+  // f should be rewritten.
+  h<int, f>(0);
+  // notBlinkFunction should stay the same.
+  h<int, not_blink::notBlinkFunction>(1);
+}
+
+}  // namespace test_template_arg_is_function
+
+namespace test_template_arg_is_method {
+
+class BlinkClass {
+ public:
+  void method() {}
+};
+
+template <typename T, void (T::*g)()>
+void h(T&& x) {
+  (x.*g)();
+}
+
+void test() {
+  // method should be rewritten.
+  h<BlinkClass, &BlinkClass::method>(BlinkClass());
+  h<not_blink::NotBlinkClass, &not_blink::NotBlinkClass::notBlinkMethod>(
+      not_blink::NotBlinkClass());
+}
+
+}  // namespace test_template_arg_is_method
+
+// Test template arguments that are function templates.
+template <typename T, char converter(T)>
+unsigned reallyBadHash(const T* data, unsigned length) {
+  unsigned hash = 1;
+  for (unsigned i = 0; i < length; ++i) {
+    hash *= converter(data[i]);
+  }
+  return hash;
+}
+
+struct StringHasher {
+  static unsigned Hash(const char* data, unsigned length) {
+    // TODO(dcheng): For some reason, brokenFoldCase gets parsed as an
+    // UnresolvedLookupExpr, so this doesn't get rewritten. Meh. See
+    // https://crbug.com/584408.
+    return reallyBadHash<char, brokenFoldCase<char>>(data, length);
+  }
+
+ private:
+  template <typename T>
+  static char brokenFoldCase(T input) {
+    return input - ('a' - 'A');
+  }
+};
+
 }  // namespace blink