| Index: content/browser/frame_host/frame_tree_node.h
 | 
| diff --git a/content/browser/frame_host/frame_tree_node.h b/content/browser/frame_host/frame_tree_node.h
 | 
| index 2cdf527eaa74c0dff125a04bbc7ef1216d273a03..05832b60b10c45424de744737d047c1b0f799ebf 100644
 | 
| --- a/content/browser/frame_host/frame_tree_node.h
 | 
| +++ b/content/browser/frame_host/frame_tree_node.h
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| @@ -39,6 +39,8 @@ class CONTENT_EXPORT FrameTreeNode {
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|      virtual ~Observer() {}
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|    };
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|  
 | 
| +  static const int kFrameTreeNodeInvalidID = -1;
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| +
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|    // Returns the FrameTreeNode with the given global |frame_tree_node_id|,
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|    // regardless of which FrameTree it is in.
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|    static FrameTreeNode* GloballyFindByID(int frame_tree_node_id);
 | 
| 
 |