Font Settings Extension API: Add functions to clear prefs.

chrome/browser/extensions/extension_font_settings_api.cc

Index: chrome/browser/extensions/extension_font_settings_api.cc
diff --git a/chrome/browser/extensions/extension_font_settings_api.cc b/chrome/browser/extensions/extension_font_settings_api.cc
index 0b250d6d74c13148ca80b970ca27bf7a187e28bb..d606135fb111d722b3aec367d8ab2cf7199cf447 100644
--- a/chrome/browser/extensions/extension_font_settings_api.cc
+++ b/chrome/browser/extensions/extension_font_settings_api.cc
@@ -276,6 +276,24 @@ void ExtensionFontSettingsEventRouter::OnFontPrefChanged(
       pref_name);
 }
 
+bool ClearFontFunction::RunImpl() {
+  DictionaryValue* details = NULL;
+  EXTENSION_FUNCTION_VALIDATE(args_->GetDictionary(0, &details));
+
+  std::string pref_path;
+  EXTENSION_FUNCTION_VALIDATE(GetFontNamePrefPath(details, &pref_path));
+
+  // Ensure |pref_path| really is for a registered per-script font pref.
+  EXTENSION_FUNCTION_VALIDATE(
+      profile_->GetPrefs()->FindPreference(pref_path.c_str()));
+
+  ExtensionPrefs* prefs = profile_->GetExtensionService()->extension_prefs();
+  prefs->RemoveExtensionControlledPref(extension_id(),
+                                       pref_path.c_str(),
+                                       kExtensionPrefsScopeRegular);
+  return true;
+}
+
 bool GetFontFunction::RunImpl() {
   DictionaryValue* details = NULL;
   EXTENSION_FUNCTION_VALIDATE(args_->GetDictionary(0, &details));
@@ -361,6 +379,14 @@ bool GetFontListFunction::CopyFontsToResult(ListValue* fonts) {
   return true;
 }
 
+bool ClearFontPrefExtensionFunction::RunImpl() {
+  ExtensionPrefs* prefs = profile_->GetExtensionService()->extension_prefs();
+  prefs->RemoveExtensionControlledPref(extension_id(),
+                                       GetPrefName(),
+                                       kExtensionPrefsScopeRegular);
+  return true;
+}
+
 bool GetFontPrefExtensionFunction::RunImpl() {
   PrefService* prefs = profile_->GetPrefs();
   const PrefService::Preference* pref = prefs->FindPreference(GetPrefName());
@@ -387,6 +413,10 @@ bool SetFontPrefExtensionFunction::RunImpl() {
   return true;
 }
 
+const char* ClearDefaultFontSizeFunction::GetPrefName() {
+  return prefs::kWebKitGlobalDefaultFontSize;
+}
+
 const char* GetDefaultFontSizeFunction::GetPrefName() {
   return prefs::kWebKitGlobalDefaultFontSize;
 }
@@ -403,6 +433,10 @@ const char* SetDefaultFontSizeFunction::GetKey() {
   return kPixelSizeKey;
 }
 
+const char* ClearDefaultFixedFontSizeFunction::GetPrefName() {
+  return prefs::kWebKitGlobalDefaultFixedFontSize;
+}
+
 const char* GetDefaultFixedFontSizeFunction::GetPrefName() {
   return prefs::kWebKitGlobalDefaultFixedFontSize;
 }
@@ -419,6 +453,10 @@ const char* SetDefaultFixedFontSizeFunction::GetKey() {
   return kPixelSizeKey;
 }
 
+const char* ClearMinimumFontSizeFunction::GetPrefName() {
+  return prefs::kWebKitGlobalMinimumFontSize;
+}
+
 const char* GetMinimumFontSizeFunction::GetPrefName() {
   return prefs::kWebKitGlobalMinimumFontSize;
 }
@@ -435,6 +473,10 @@ const char* SetMinimumFontSizeFunction::GetKey() {
   return kPixelSizeKey;
 }
 
+const char* ClearDefaultCharacterSetFunction::GetPrefName() {
+  return prefs::kGlobalDefaultCharset;
+}
+
 const char* GetDefaultCharacterSetFunction::GetPrefName() {
   return prefs::kGlobalDefaultCharset;
 }