Standardize usage of virtual/override/final in content/

content/common/sandbox_mac_fontloading_unittest.mm

Index: content/common/sandbox_mac_fontloading_unittest.mm
diff --git a/content/common/sandbox_mac_fontloading_unittest.mm b/content/common/sandbox_mac_fontloading_unittest.mm
index d16437cb2cfcbd606b99e52f5af01abbf6f2f94c..645a7f6d909c08b7e507aa954a545b477b687e5b 100644
--- a/content/common/sandbox_mac_fontloading_unittest.mm
+++ b/content/common/sandbox_mac_fontloading_unittest.mm
@@ -20,8 +20,9 @@ namespace content {
 class FontLoadingTestCase : public MacSandboxTestCase {
  public:
   FontLoadingTestCase() : font_data_length_(-1) {}
-  virtual bool BeforeSandboxInit() override;
-  virtual bool SandboxedTest() override;
+  bool BeforeSandboxInit() override;
+  bool SandboxedTest() override;
+
  private:
   scoped_ptr<base::SharedMemory> font_shmem_;
   size_t font_data_length_;