State management cleanup

third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.h

Index: third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.h
diff --git a/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.h b/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.h
index afe1854c196e328843757d75129e5e1f9b301ad4..05e9430764da0c2423c455839447826b87161d0a 100644
--- a/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.h
+++ b/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.h
@@ -727,6 +727,9 @@ class WebGL2RenderingContextBase : public WebGLRenderingContextBase {
       std::unique_ptr<WebGraphicsContext3DProvider>,
       const CanvasContextCreationAttributes& requestedAttributes);
 
+  // DrawingBufferRestoreStateSource implementation.
+  void GetDrawingBufferRestoreState(DrawingBufferRestoreState*) override;
+
   // Helper function to validate target and the attachment combination for
   // getFramebufferAttachmentParameters.  Generate GL error and return false if
   // parameters are illegal.