Font Settings Extension API: Add functions to clear prefs.

chrome/browser/extensions/extension_function_registry.cc

Index: chrome/browser/extensions/extension_function_registry.cc
diff --git a/chrome/browser/extensions/extension_function_registry.cc b/chrome/browser/extensions/extension_function_registry.cc
index a7d3f8b1fe118e7d9f14e0049e45a8d47527925f..2997c2473d93c0627083587151feda014672320a 100644
--- a/chrome/browser/extensions/extension_function_registry.cc
+++ b/chrome/browser/extensions/extension_function_registry.cc
@@ -422,14 +422,19 @@ void ExtensionFunctionRegistry::ResetFunctions() {
 
   // Font settings.
   RegisterFunction<GetFontListFunction>();
+  RegisterFunction<ClearFontFunction>();
   RegisterFunction<GetFontFunction>();
   RegisterFunction<SetFontFunction>();
+  RegisterFunction<ClearDefaultFontSizeFunction>();
   RegisterFunction<GetDefaultFontSizeFunction>();
   RegisterFunction<SetDefaultFontSizeFunction>();
+  RegisterFunction<ClearDefaultFixedFontSizeFunction>();
   RegisterFunction<GetDefaultFixedFontSizeFunction>();
   RegisterFunction<SetDefaultFixedFontSizeFunction>();
+  RegisterFunction<ClearMinimumFontSizeFunction>();
   RegisterFunction<GetMinimumFontSizeFunction>();
   RegisterFunction<SetMinimumFontSizeFunction>();
+  RegisterFunction<ClearDefaultCharacterSetFunction>();
   RegisterFunction<GetDefaultCharacterSetFunction>();
   RegisterFunction<SetDefaultCharacterSetFunction>();