Update {virtual,override} to follow C++11 style in content.

content/test/ppapi/ppapi_test.h

Index: content/test/ppapi/ppapi_test.h
diff --git a/content/test/ppapi/ppapi_test.h b/content/test/ppapi/ppapi_test.h
index a1a35977b0852e35f508f293f678562267e9b92c..92d5f8b288f7d697ed3dfea20a4fc65647f46f79 100644
--- a/content/test/ppapi/ppapi_test.h
+++ b/content/test/ppapi/ppapi_test.h
@@ -28,8 +28,8 @@ class PPAPITestMessageHandler : public content::TestMessageHandler {
  public:
   PPAPITestMessageHandler();
 
-  virtual MessageResponse HandleMessage(const std::string& json) override;
-  virtual void Reset() override;
+  MessageResponse HandleMessage(const std::string& json) override;
+  void Reset() override;
 
   const std::string& message() const {
     return message_;
@@ -46,7 +46,7 @@ class PPAPITestBase : public ContentBrowserTest {
   PPAPITestBase();
 
   // ContentBrowserTest overrides.
-  virtual void SetUpCommandLine(base::CommandLine* command_line) override;
+  void SetUpCommandLine(base::CommandLine* command_line) override;
 
   virtual std::string BuildQuery(const std::string& base,
                                  const std::string& test_case) = 0;
@@ -71,10 +71,11 @@ class PPAPITest : public PPAPITestBase {
  public:
   PPAPITest();
 
-  virtual void SetUpCommandLine(base::CommandLine* command_line) override;
+  void SetUpCommandLine(base::CommandLine* command_line) override;
+
+  std::string BuildQuery(const std::string& base,
+                         const std::string& test_case) override;
 
-  virtual std::string BuildQuery(const std::string& base,
-                                 const std::string& test_case) override;
  protected:
   bool in_process_;  // Controls the --ppapi-in-process switch.
 };
@@ -85,8 +86,8 @@ class OutOfProcessPPAPITest : public PPAPITest {
  public:
   OutOfProcessPPAPITest();
 
-  virtual void SetUp() override;
-  virtual void TearDown() override;
+  void SetUp() override;
+  void TearDown() override;
 };
 
 }  // namespace