Move ContextMenuParams struct from webkit/glue to content/public/common. The reasons are:

content/renderer/render_view_impl.h

Index: content/renderer/render_view_impl.h
===================================================================
--- content/renderer/render_view_impl.h	(revision 121660)
+++ content/renderer/render_view_impl.h	(working copy)
@@ -90,6 +90,7 @@
 class P2PSocketDispatcher;
 class RenderViewObserver;
 class RenderViewTest;
+struct CustomContextMenuContext;
 struct FileChooserParams;
 }  // namespace content
 
@@ -107,7 +108,6 @@
 }  // namespace webkit
 
 namespace webkit_glue {
-struct CustomContextMenuContext;
 class ImageResourceFetcher;
 class ResourceFetcher;
 }
@@ -780,7 +780,7 @@
                        const PP_NetAddress_Private& remote_addr);
 #endif
   void OnContextMenuClosed(
-      const webkit_glue::CustomContextMenuContext& custom_context);
+      const content::CustomContextMenuContext& custom_context);
   void OnCopy();
   void OnCopyImageAt(int x, int y);
 #if defined(OS_MACOSX)
@@ -790,7 +790,7 @@
   void OnCSSInsertRequest(const string16& frame_xpath,
                           const std::string& css);
   void OnCustomContextMenuAction(
-      const webkit_glue::CustomContextMenuContext& custom_context,
+      const content::CustomContextMenuContext& custom_context,
       unsigned action);
   void OnDelete();
   void OnDeterminePageLanguage();