Standardize usage of virtual/override/final in content/

content/child/fileapi/webfilewriter_base_unittest.cc

Index: content/child/fileapi/webfilewriter_base_unittest.cc
diff --git a/content/child/fileapi/webfilewriter_base_unittest.cc b/content/child/fileapi/webfilewriter_base_unittest.cc
index 5251e735d27246bec8f907714ec029b4772be955..68f58ff9f883635b74358a3b5e4c8782625eca76 100644
--- a/content/child/fileapi/webfilewriter_base_unittest.cc
+++ b/content/child/fileapi/webfilewriter_base_unittest.cc
@@ -65,7 +65,7 @@ class TestableFileWriter : public WebFileWriterBase {
   bool received_cancel_;
 
  protected:
-  virtual void DoTruncate(const GURL& path, int64 offset) override {
+  void DoTruncate(const GURL& path, int64 offset) override {
     received_truncate_ = true;
     received_truncate_path_ = path;
     received_truncate_offset_ = offset;
@@ -87,9 +87,9 @@ class TestableFileWriter : public WebFileWriterBase {
     }
   }
 
-  virtual void DoWrite(
-        const GURL& path, const std::string& blob_uuid,
-        int64 offset) override {
+  void DoWrite(const GURL& path,
+               const std::string& blob_uuid,
+               int64 offset) override {
     received_write_ = true;
     received_write_path_ = path;
     received_write_offset_ = offset;
@@ -122,9 +122,7 @@ class TestableFileWriter : public WebFileWriterBase {
     }
   }
 
-  virtual void DoCancel() override {
-    received_cancel_ = true;
-  }
+  void DoCancel() override { received_cancel_ = true; }
 };
 
 class FileWriterTest : public testing::Test,