Move wxWebViewIE specific functions to correct interface class

interface/wx/webview.h

@@ -267,6 +267,7 @@ public:
     @section descriptions Backend Descriptions
 
     @par wxWEBVIEW_BACKEND_IE (MSW)
+    @anchor wxWEBVIEW_BACKEND_IE
 
     The IE backend uses Microsoft's Trident rendering engine, specifically the
     version used by the locally installed copy of Internet Explorer. As such it
@@ -514,56 +515,6 @@ public:
     */
     virtual void Reload(wxWebViewReloadFlags flags = wxWEBVIEW_RELOAD_DEFAULT) = 0;
 
-    /**
-        Sets emulation level.
-
-        This function is useful to change the emulation level of
-        the system browser control used for wxWebView implementation under
-        MSW, rather than using the currently default, IE7-compatible, level.
-
-        Please notice that this function works by modifying the per-user part
-        of MSW registry, which has several implications: first, it is
-        sufficient to call it only once (per user) as the changes done by it
-        are persistent and, second, if you do not want them to be persistent,
-        you need to call it with @c wxWEBVIEWIE_EMU_DEFAULT argument explicitly.
-
-        In particular, this function should be called to allow RunScript() to
-        work for JavaScript code returning arbitrary objects, which is not
-        supported at the default emulation level.
-
-        If set to a level higher than installed version, the highest available
-        level will be used instead. @c wxWEBVIEWIE_EMU_IE11 is recommended for
-        best performance and experience.
-
-        This function is MSW-specific and doesn't exist under other platforms.
-
-        See https://msdn.microsoft.com/en-us/library/ee330730#browser_emulation
-        for more information about browser control emulation levels.
-
-        @param level the target emulation level
-        @return @true on success, @false on failure (a warning message is also
-        logged in the latter case).
-
-        @since 3.1.3
-    */
-    static bool MSWSetEmulationLevel(wxWebViewIE_EmulationLevel level = wxWEBVIEWIE_EMU_IE11);
-
-    /**
-        @deprecated
-        This function is kept mostly for backwards compatibility.
-
-        Please explicitly specify emulation level with MSWSetEmulationLevel().
-
-        @param modernLevel @true to set level to IE8, synonym for @c wxWEBVIEWIE_EMU_IE8.
-            @false to reset the emulation level to its default,
-            synonym for @c wxWEBVIEWIE_EMU_DEFAULT.
-        @return @true on success, @false on failure (a warning message is also
-            logged in the latter case).
-
-        @since 3.1.1
-    */
-    static bool MSWSetModernEmulationLevel(bool modernLevel = true);
-
     /**
         Runs the given JavaScript code.
 
@@ -904,6 +855,72 @@ public:
 
 
 
+/**
+    @class wxWebViewIE
+
+    wxWebView using IE backend, see @ref wxWEBVIEW_BACKEND_IE.
+
+    @onlyfor{wxmsw}
+    @since 2.9.3
+    @library{wxwebview}
+    @category{ctrl,webview}
+    @see wxWebView
+ */
+class wxWebViewIE : public wxWebView
+{
+public:
+    /**
+        Sets emulation level.
+
+        This function is useful to change the emulation level of
+        the system browser control used for wxWebView implementation under
+        MSW, rather than using the currently default, IE7-compatible, level.
+
+        Please notice that this function works by modifying the per-user part
+        of MSW registry, which has several implications: first, it is
+        sufficient to call it only once (per user) as the changes done by it
+        are persistent and, second, if you do not want them to be persistent,
+        you need to call it with @c wxWEBVIEWIE_EMU_DEFAULT argument explicitly.
+
+        In particular, this function should be called to allow RunScript() to
+        work for JavaScript code returning arbitrary objects, which is not
+        supported at the default emulation level.
+
+        If set to a level higher than installed version, the highest available
+        level will be used instead. @c wxWEBVIEWIE_EMU_IE11 is recommended for
+        best performance and experience.
+
+        This function is MSW-specific and doesn't exist under other platforms.
+
+        See https://msdn.microsoft.com/en-us/library/ee330730#browser_emulation
+        for more information about browser control emulation levels.
+
+        @param level the target emulation level
+        @return @true on success, @false on failure (a warning message is also
+        logged in the latter case).
+
+        @since 3.1.3
+    */
+    static bool MSWSetEmulationLevel(wxWebViewIE_EmulationLevel level = wxWEBVIEWIE_EMU_IE11);
+
+    /**
+        @deprecated
+        This function is kept mostly for backwards compatibility.
+
+        Please explicitly specify emulation level with MSWSetEmulationLevel().
+
+        @param modernLevel @true to set level to IE8, synonym for @c wxWEBVIEWIE_EMU_IE8.
+            @false to reset the emulation level to its default,
+            synonym for @c wxWEBVIEWIE_EMU_DEFAULT.
+        @return @true on success, @false on failure (a warning message is also
+            logged in the latter case).
+
+        @since 3.1.1
+    */
+    static bool MSWSetModernEmulationLevel(bool modernLevel = true);
+};
+
+
 
 /**
     @class wxWebViewEvent