Add Pepper TrueType font API call to enumerate fonts in a given family.

ppapi/thunk/ppb_truetype_font_thunk.cc

Index: ppapi/thunk/ppb_truetype_font_thunk.cc
diff --git a/ppapi/thunk/ppb_truetype_font_thunk.cc b/ppapi/thunk/ppb_truetype_font_thunk.cc
index 4b47afbe5a3f3e496706c944a1923b2fe77cdb67..ef3cdbd6bc2ed5b24328807b99a93052287899e9 100644
--- a/ppapi/thunk/ppb_truetype_font_thunk.cc
+++ b/ppapi/thunk/ppb_truetype_font_thunk.cc
@@ -28,6 +28,18 @@ int32_t GetFontFamilies(PP_Instance instance,
       enter.functions()->GetFontFamilies(instance, output, enter.callback()));
 }
 
+int32_t GetFontsInFamily(PP_Instance instance,
+                         PP_Var family,
+                         PP_ArrayOutput output,
+                         PP_CompletionCallback callback) {
+  EnterInstanceAPI<PPB_TrueTypeFont_Singleton_API> enter(instance, callback);
+  if (enter.failed())
+    return PP_ERROR_FAILED;
+  return enter.SetResult(
+      enter.functions()->GetFontsInFamily(instance, family, output,
+                                          enter.callback()));
+}
+
 PP_Resource Create(PP_Instance instance,
                    const PP_TrueTypeFontDesc_Dev* desc) {
   EnterResourceCreation enter(instance);
@@ -36,7 +48,7 @@ PP_Resource Create(PP_Instance instance,
   return enter.functions()->CreateTrueTypeFont(instance, *desc);
 }
 
-PP_Bool IsFont(PP_Resource resource) {
+PP_Bool IsTrueTypeFont(PP_Resource resource) {
   EnterResource<PPB_TrueTypeFont_API> enter(resource, false);
   return PP_FromBool(enter.succeeded());
 }
@@ -78,8 +90,9 @@ int32_t GetTable(PP_Resource font,
 
 const PPB_TrueTypeFont_Dev_0_1 g_ppb_truetypefont_thunk_0_1 = {
   &GetFontFamilies,
+  &GetFontsInFamily,
   &Create,
-  &IsFont,
+  &IsTrueTypeFont,
   &Describe,
   &GetTableTags,
   &GetTable