Standardize usage of virtual/override/final specifiers.

chrome/browser/ui/views/frame/browser_desktop_window_tree_host_x11.cc

Index: chrome/browser/ui/views/frame/browser_desktop_window_tree_host_x11.cc
diff --git a/chrome/browser/ui/views/frame/browser_desktop_window_tree_host_x11.cc b/chrome/browser/ui/views/frame/browser_desktop_window_tree_host_x11.cc
index e8ae27d35ecf235bbb8e7d7f6a908dbf5fbbb268..7c4b0e9b205fa4e159a69c1f5a8b923aee9e9488 100644
--- a/chrome/browser/ui/views/frame/browser_desktop_window_tree_host_x11.cc
+++ b/chrome/browser/ui/views/frame/browser_desktop_window_tree_host_x11.cc
@@ -24,32 +24,29 @@ class DesktopThemeProvider : public ui::ThemeProvider {
       : delegate_(delegate) {
   }
 
-  virtual bool UsingSystemTheme() const override {
+  bool UsingSystemTheme() const override {
     return delegate_->UsingSystemTheme();
   }
-  virtual gfx::ImageSkia* GetImageSkiaNamed(int id) const override {
+  gfx::ImageSkia* GetImageSkiaNamed(int id) const override {
     if (delegate_->UsingSystemTheme())
       return delegate_->GetImageSkiaNamed(id);
 
     return delegate_->GetImageSkiaNamed(
         chrome::MapThemeImage(chrome::HOST_DESKTOP_TYPE_NATIVE, id));
   }
-  virtual SkColor GetColor(int id) const override {
-    return delegate_->GetColor(id);
-  }
-  virtual int GetDisplayProperty(int id) const override {
+  SkColor GetColor(int id) const override { return delegate_->GetColor(id); }
+  int GetDisplayProperty(int id) const override {
     return delegate_->GetDisplayProperty(id);
   }
-  virtual bool ShouldUseNativeFrame() const override {
+  bool ShouldUseNativeFrame() const override {
     return delegate_->ShouldUseNativeFrame();
   }
-  virtual bool HasCustomImage(int id) const override {
+  bool HasCustomImage(int id) const override {
     return delegate_->HasCustomImage(
         chrome::MapThemeImage(chrome::HOST_DESKTOP_TYPE_NATIVE, id));
   }
-  virtual base::RefCountedMemory* GetRawData(
-      int id,
-      ui::ScaleFactor scale_factor) const override {
+  base::RefCountedMemory* GetRawData(int id, ui::ScaleFactor scale_factor)
+      const override {
     return delegate_->GetRawData(id, scale_factor);
   }