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

content/test/render_view_test.cc

Index: content/test/render_view_test.cc
===================================================================
--- content/test/render_view_test.cc	(revision 121660)
+++ content/test/render_view_test.cc	(working copy)
@@ -331,6 +331,15 @@
   impl->OnMessageReceived(*input_message);
 }
 
+void RenderViewTest::SendWebMouseEvent(
+    const WebKit::WebMouseEvent& mouse_event) {
+  scoped_ptr<IPC::Message> input_message(new ViewMsg_HandleInputEvent(0));
+  input_message->WriteData(reinterpret_cast<const char*>(&mouse_event),
+                           sizeof(WebKit::WebMouseEvent));
+  RenderViewImpl* impl = static_cast<RenderViewImpl*>(view_);
+  impl->OnMessageReceived(*input_message);
+}
+
 const char* const kGetCoordinatesScript =
     "(function() {"
     "  function GetCoordinates(elem) {"