Standardize usage of virtual/override/final in cc/

cc/resources/resource_provider.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_RESOURCES_RESOURCE_PROVIDER_H_
 #define CC_RESOURCES_RESOURCE_PROVIDER_H_
 
 #include <deque>
 #include <set>
 #include <string>
@@ skipping 220 matching lines @@
 
   class CC_EXPORT ScopedSamplerGL : public ScopedReadLockGL {
    public:
     ScopedSamplerGL(ResourceProvider* resource_provider,
                     ResourceProvider::ResourceId resource_id,
                     GLenum filter);
     ScopedSamplerGL(ResourceProvider* resource_provider,
                     ResourceProvider::ResourceId resource_id,
                     GLenum unit,
                     GLenum filter);
-    virtual ~ScopedSamplerGL();
+    ~ScopedSamplerGL() override;
 
     GLenum target() const { return target_; }
 
    private:
     GLenum unit_;
     GLenum target_;
 
     DISALLOW_COPY_AND_ASSIGN(ScopedSamplerGL);
   };
 
@@ skipping 360 matching lines @@
   return format_gl_data_format[format];
 }
 
 inline GLenum GLInternalFormat(ResourceFormat format) {
   return GLDataFormat(format);
 }
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_RESOURCE_PROVIDER_H_