Fix sky include guards to match Chromium style

sky/engine/core/html/canvas/ANGLEInstancedArrays.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
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  * notice, this list of conditions and the following disclaimer.
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  * in the documentation and/or other materials provided with the
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-#ifndef ANGLEInstancedArrays_h
-#define ANGLEInstancedArrays_h
+#ifndef SKY_ENGINE_CORE_HTML_CANVAS_ANGLEINSTANCEDARRAYS_H_
+#define SKY_ENGINE_CORE_HTML_CANVAS_ANGLEINSTANCEDARRAYS_H_
 
 #include "sky/engine/bindings/core/v8/ScriptWrappable.h"
 #include "sky/engine/core/html/canvas/WebGLExtension.h"
 #include "sky/engine/wtf/PassRefPtr.h"
 
 namespace blink {
 
 class WebGLRenderingContextBase;
 
 class ANGLEInstancedArrays final : public WebGLExtension, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static PassRefPtr<ANGLEInstancedArrays> create(WebGLRenderingContextBase*);
     static bool supported(WebGLRenderingContextBase*);
     static const char* extensionName();
 
     virtual ~ANGLEInstancedArrays();
     virtual WebGLExtensionName name() const override;
 
     void drawArraysInstancedANGLE(GLenum mode, GLint first, GLsizei count, GLsizei primcount);
     void drawElementsInstancedANGLE(GLenum mode, GLsizei count, GLenum type, long long offset, GLsizei primcount);
     void vertexAttribDivisorANGLE(GLuint index, GLuint divisor);
 
 private:
     explicit ANGLEInstancedArrays(WebGLRenderingContextBase*);
 };
 
 } // namespace blink
 
-#endif // ANGLEInstancedArrays_h
+#endif  // SKY_ENGINE_CORE_HTML_CANVAS_ANGLEINSTANCEDARRAYS_H_