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

webkit/tools/test_shell/test_webview_delegate.cc

Index: webkit/tools/test_shell/test_webview_delegate.cc
===================================================================
--- webkit/tools/test_shell/test_webview_delegate.cc	(revision 121660)
+++ webkit/tools/test_shell/test_webview_delegate.cc	(working copy)
@@ -495,22 +495,9 @@
   return true;  // Allow window closure.
 }
 
-void TestWebViewDelegate::showContextMenu(
-    WebFrame* frame, const WebContextMenuData& data) {
-  CapturedContextMenuEvent context(data.mediaType,
-                                   data.mousePosition.x,
-                                   data.mousePosition.y);
-  captured_context_menu_events_.push_back(context);
-  last_context_menu_data_.reset(new WebContextMenuData(data));
-}
 
-void TestWebViewDelegate::ClearContextMenuData() {
-  last_context_menu_data_.reset();
-}
 
 
-
-
 void TestWebViewDelegate::setStatusText(const WebString& text) {
 }