mac: Prepare most test code for -Wunused-functions too.

chrome/test/perf/generate_profile.cc

Index: chrome/test/perf/generate_profile.cc
diff --git a/chrome/test/perf/generate_profile.cc b/chrome/test/perf/generate_profile.cc
index d3484b5ba7bde0c643cc6ac2c033db9d8eb6ce16..b3fcf66c9ab7dd861a305dea66099cd4c7edfb4b 100644
--- a/chrome/test/perf/generate_profile.cc
+++ b/chrome/test/perf/generate_profile.cc
@@ -114,11 +114,6 @@ string16 ConstructRandomTitle() {
   return RandomWords(RandomInt(3, 15));
 }
 
-// Return a random string that could function as page contents.
-string16 ConstructRandomPage() {
-  return RandomWords(RandomInt(10, 4000));
-}
-
 // Insert a batch of |batch_size| URLs, starting at pageid |page_id|.
 void InsertURLBatch(Profile* profile,
                     int page_id,