Bug 616426 - fix paramater type. r=blassey. a=me

gfx/thebes/gfxAndroidPlatform.cpp

@@ -418,7 +418,7 @@ gfxAndroidPlatform::AppendFacesFromFontFile(const char *aFileName, FontNameCache
 }
 
 void
-gfxAndroidPlatform::FindFontsInDirectory(nsCString aFontsDir,
+gfxAndroidPlatform::FindFontsInDirectory(const nsCString& aFontsDir,
                                          FontNameCache* aFontCache)
 {
     DIR *d = opendir(aFontsDir.get());

gfx/thebes/gfxAndroidPlatform.h

@@ -107,7 +107,7 @@ public:
 
 protected:
     void AppendFacesFromFontFile(const char *aFileName, FontNameCache* aFontCache, InfallibleTArray<FontListEntry>* retValue);
-    void FindFontsInDirectory(nsCString aFontsDir, FontNameCache* aFontCache);
+    void FindFontsInDirectory(const nsCString& aFontsDir, FontNameCache* aFontCache);
 
     typedef nsDataHashtable<nsStringHashKey, nsRefPtr<FontFamily> > FontTable;