Fix race condition in parallel font initialization.

src/ports/SkFontConfigInterface_direct.cpp

 /*
  * Copyright 2009 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /* migrated from chrome/src/skia/ext/SkFontHost_fontconfig_direct.cpp */
 
 #include <string>
@@ skipping 106 matching lines @@
     // new APIs
     virtual SkDataTable* getFamilyNames() SK_OVERRIDE;
     virtual bool matchFamilySet(const char inFamilyName[],
                                 SkString* outFamilyName,
                                 SkTArray<FontIdentity>*) SK_OVERRIDE;
 
 private:
     SkMutex mutex_;
 };
 
-SkFontConfigInterface* SkFontConfigInterface::GetSingletonDirectInterface() {
-    SK_DECLARE_STATIC_LAZY_PTR(SkFontConfigInterfaceDirect, direct);
-    return direct.get();
+SkFontConfigInterface* SkFontConfigInterface::GetSingletonDirectInterface(SkBaseMutex* mutex) {
+    SkAutoMutexAcquire ac(mutex);
+    static SkFontConfigInterfaceDirect* singleton = NULL;
+    if (singleton == NULL) {
+        singleton = SkNEW(SkFontConfigInterfaceDirect);
+    }
+    return singleton;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 // Returns the string from the pattern, or NULL
 static const char* get_name(FcPattern* pattern, const char field[],
                             int index = 0) {
     const char* name;
     if (FcPatternGetString(pattern, field, index,
                            (FcChar8**)&name) != FcResultMatch) {
@@ skipping 580 matching lines @@
                 *trimmedMatches.append() = match[i];
             }
         }
 
         SkFontStyleSet_FC* sset = SkNEW_ARGS(SkFontStyleSet_FC,
                                              (trimmedMatches.begin(),
                                               trimmedMatches.count()));
 #endif
     return false;
 }