Auto-generates the font family scripts at build time.

chrome/browser/ui/prefs/prefs_tab_helper.cc

Index: chrome/browser/ui/prefs/prefs_tab_helper.cc
diff --git a/chrome/browser/ui/prefs/prefs_tab_helper.cc b/chrome/browser/ui/prefs/prefs_tab_helper.cc
index 2e3c8ab1239342f9acbc7b5c4268ab51fe1c740a..3f0d234707765647b2c25dc7addce4744f08e1d7 100644
--- a/chrome/browser/ui/prefs/prefs_tab_helper.cc
+++ b/chrome/browser/ui/prefs/prefs_tab_helper.cc
@@ -15,6 +15,7 @@
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/renderer_preferences_util.h"
 #include "chrome/common/chrome_notification_types.h"
+#include "chrome/common/pref_font_webkit_names.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/pref_names_util.h"
 #include "components/user_prefs/pref_registry_syncable.h"
@@ -119,16 +120,34 @@ const char* kPrefsToObserve[] = {
 
 const int kPrefsToObserveLength = arraysize(kPrefsToObserve);
 
-// Registers a preference under the path |map_name| for each script used for
-// per-script font prefs.  For example, if |map_name| is "fonts.serif", then
+// Registers a preference under the path |pref_name| for each script used for
+// per-script font prefs.
+// For example, for WEBKIT_WEBPREFS_FONTS_SERIF ("fonts.serif"):
 // "fonts.serif.Arab", "fonts.serif.Hang", etc. are registered.
-void RegisterFontFamilyMap(PrefRegistrySyncable* registry,
-                           const char* map_name,
-                           const std::set<std::string>& fonts_with_defaults) {
-  for (size_t i = 0; i < prefs::kWebKitScriptsForFontFamilyMapsLength; ++i) {
-    const char* script = prefs::kWebKitScriptsForFontFamilyMaps[i];
-    std::string pref_name_str = base::StringPrintf("%s.%s", map_name, script);
-    const char* pref_name = pref_name_str.c_str();
+// |fonts_with_defaults| contains all |pref_names| already registered since they
+// have a specified default value.
+void RegisterFontFamilyPrefs(PrefRegistrySyncable* registry,
+                             const std::set<std::string>& fonts_with_defaults) {
+
+  // Expand the font concatenated with script name so this stays at RO memory
+  // rather than allocated in heap.
+  static const char* const kFontFamilyMap[] = {
+#define EXPAND_SCRIPT_FONT(map_name, script_name) map_name "." script_name,
+
+#include "chrome/common/pref_font_script_names-inl.h"
+ALL_FONT_SCRIPTS(WEBKIT_WEBPREFS_FONTS_CURSIVE)
+ALL_FONT_SCRIPTS(WEBKIT_WEBPREFS_FONTS_FANTASY)
+ALL_FONT_SCRIPTS(WEBKIT_WEBPREFS_FONTS_FIXED)
+ALL_FONT_SCRIPTS(WEBKIT_WEBPREFS_FONTS_PICTOGRAPH)
+ALL_FONT_SCRIPTS(WEBKIT_WEBPREFS_FONTS_SANSERIF)
+ALL_FONT_SCRIPTS(WEBKIT_WEBPREFS_FONTS_SERIF)
+ALL_FONT_SCRIPTS(WEBKIT_WEBPREFS_FONTS_STANDARD)
+
+#undef EXPAND_SCRIPT_FONT
+  };
+
+  for (size_t i = 0; i < arraysize(kFontFamilyMap); ++i) {
+    const char* pref_name = kFontFamilyMap[i];
     if (fonts_with_defaults.find(pref_name) == fonts_with_defaults.end()) {
       // We haven't already set a default value for this font preference, so set
       // an empty string as the default.
@@ -546,20 +565,7 @@ void PrefsTabHelper::RegisterUserPrefs(PrefRegistrySyncable* registry) {
   }
 
   // Register font prefs that don't have defaults.
-  RegisterFontFamilyMap(registry, prefs::kWebKitStandardFontFamilyMap,
-                        fonts_with_defaults);
-  RegisterFontFamilyMap(registry, prefs::kWebKitFixedFontFamilyMap,
-                        fonts_with_defaults);
-  RegisterFontFamilyMap(registry, prefs::kWebKitSerifFontFamilyMap,
-                        fonts_with_defaults);
-  RegisterFontFamilyMap(registry, prefs::kWebKitSansSerifFontFamilyMap,
-                        fonts_with_defaults);
-  RegisterFontFamilyMap(registry, prefs::kWebKitCursiveFontFamilyMap,
-                        fonts_with_defaults);
-  RegisterFontFamilyMap(registry, prefs::kWebKitFantasyFontFamilyMap,
-                        fonts_with_defaults);
-  RegisterFontFamilyMap(registry, prefs::kWebKitPictographFontFamilyMap,
-                        fonts_with_defaults);
+  RegisterFontFamilyPrefs(registry, fonts_with_defaults);
 
   registry->RegisterLocalizedIntegerPref(prefs::kWebKitDefaultFontSize,
                                          IDS_DEFAULT_FONT_SIZE,