[lldb] Remove unimplemented StackFrame::BehavesLikeZerothFrame

[anton.kolesov]

Summary

Commit [1] added a declaration of function-member
StackFrame::BehavesLikeZerothFrame but hasn't added an implementation
for the function. This commit removes this declation, because the
function is not used anywhere.

[1] 31e6dbe1c6a6 Fix PC adjustment in StackFrame::GetSymbolContext

[labath]

If it's not used anywhere, maybe we should delete it instead?

[anton.kolesov]

Removed function declaration as requested.

lldb/include/lldb/Target/StackFrame.h

public:
   /// Query whether this frame is part of a historical backtrace.
   bool IsHistorical() const;
 
   /// Query whether this frame is artificial (e.g a synthesized result of
   /// inferring missing tail call frames from a backtrace). Artificial frames
   /// may have limited support for inspecting variables.
   bool IsArtificial() const;
 
-  /// Query whether this frame behaves like the zeroth frame, in the sense
-  /// that its pc value might not immediately follow a call (and thus might
-  /// be the first address of its function).  True for actual frame zero as
-  /// well as any other frame with the same trait.
-  bool BehavesLikeZerothFrame() const;
-
   /// Query this frame to find what frame it is in this Thread's
   /// StackFrameList.
   ///
   /// \return
   ///   StackFrame index 0 indicates the currently-executing function.  Inline
   ///   frames are included in this frame index count.
   uint32_t GetFrameIndex() const;
 
Address m_frame_code_addr; // The frame code address (might not be the same as
                              // section/offset address
   SymbolContext m_sc;
   Flags m_flags;
   Scalar m_frame_base;
   Status m_frame_base_error;
   bool m_cfa_is_valid; // Does this frame have a CFA?  Different from CFA ==
                        // LLDB_INVALID_ADDRESS
   Kind m_stack_frame_kind;
+
+  // Whether this frame behaves like the zeroth frame, in the sense
+  // that its pc value might not immediately follow a call (and thus might
+  // be the first address of its function). True for actual frame zero as
+  // well as any other frame with the same trait.
   bool m_behaves_like_zeroth_frame;
   lldb::VariableListSP m_variable_list_sp;
   ValueObjectList m_variable_list_value_objects; // Value objects for each
                                                  // variable in
                                                  // m_variable_list_sp
   lldb::RecognizedStackFrameSP m_recognized_frame_sp;
   StreamString m_disassembly;
   std::recursive_mutex m_mutex;
 
   DISALLOW_COPY_AND_ASSIGN(StackFrame);
 };
 
 } // namespace lldb_private
 
 #endif // LLDB_TARGET_STACKFRAME_H