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

content/browser/renderer_host/media/video_capture_host_unittest.cc

Index: content/browser/renderer_host/media/video_capture_host_unittest.cc
diff --git a/content/browser/renderer_host/media/video_capture_host_unittest.cc b/content/browser/renderer_host/media/video_capture_host_unittest.cc
index dd9ba733212972b5e80d5b92cbc0f22a5d289f7c..763ed1f9ca83edcafa1e45d3e0904002209de377 100644
--- a/content/browser/renderer_host/media/video_capture_host_unittest.cc
+++ b/content/browser/renderer_host/media/video_capture_host_unittest.cc
@@ -180,7 +180,7 @@ class MockVideoCaptureHost : public VideoCaptureHost {
   }
 
  private:
-  virtual ~MockVideoCaptureHost() {
+  ~MockVideoCaptureHost() override {
     STLDeleteContainerPairSecondPointers(filled_dib_.begin(),
                                          filled_dib_.end());
   }
@@ -188,7 +188,7 @@ class MockVideoCaptureHost : public VideoCaptureHost {
   // This method is used to dispatch IPC messages to the renderer. We intercept
   // these messages here and dispatch to our mock methods to verify the
   // conversation between this object and the renderer.
-  virtual bool Send(IPC::Message* message) override {
+  bool Send(IPC::Message* message) override {
     CHECK(message);
 
     // In this method we dispatch the messages to the according handlers as if
@@ -286,7 +286,7 @@ class VideoCaptureHostTest : public testing::Test {
         message_loop_(base::MessageLoopProxy::current()),
         opened_session_id_(kInvalidMediaCaptureSessionId) {}
 
-  virtual void SetUp() override {
+  void SetUp() override {
     SetBrowserClientForTesting(&browser_client_);
 
 #if defined(OS_CHROMEOS)
@@ -309,7 +309,7 @@ class VideoCaptureHostTest : public testing::Test {
     OpenSession();
   }
 
-  virtual void TearDown() override {
+  void TearDown() override {
     // Verifies and removes the expectations on host_ and
     // returns true iff successful.
     Mock::VerifyAndClearExpectations(host_.get());