Wire GetWindowRect, GetRootWindowRect, and GetScreenInfo out to the UI thread.

chrome/browser/renderer_host/resource_message_filter_win.cc

Index: chrome/browser/renderer_host/resource_message_filter_win.cc
diff --git a/chrome/browser/renderer_host/resource_message_filter_win.cc b/chrome/browser/renderer_host/resource_message_filter_win.cc
index 2aae6ed97857ab74a073f67a2ed36faa3ef9ef69..b9acece1966b8352fd8d66680e7e8c9f0a33e40c 100644
--- a/chrome/browser/renderer_host/resource_message_filter_win.cc
+++ b/chrome/browser/renderer_host/resource_message_filter_win.cc
@@ -4,10 +4,17 @@
 
 #include "chrome/browser/renderer_host/resource_message_filter.h"
 #include "chrome/common/render_messages.h"
+#include "webkit/api/public/win/WebScreenInfoFactory.h"
+
+using WebKit::WebScreenInfo;
+using WebKit::WebScreenInfoFactory;
 
 // We get null window_ids passed into the two functions below; please see
 // http://crbug.com/9060 for more details.
 
+// TODO(shess): Provide a mapping from reply_msg->routing_id() to HWND
+// so that we can eliminate the NativeViewId parameter.
+
 void ResourceMessageFilter::OnGetWindowRect(gfx::NativeViewId window_id,
                                             IPC::Message* reply_msg) {
   HWND window = gfx::NativeViewFromId(window_id);
@@ -30,3 +37,11 @@ void ResourceMessageFilter::OnGetRootWindowRect(gfx::NativeViewId window_id,
   ViewHostMsg_GetRootWindowRect::WriteReplyParams(reply_msg, rect);
   Send(reply_msg);
 }
+
+void ResourceMessageFilter::OnGetScreenInfo(gfx::NativeViewId view,
+                                            IPC::Message* reply_msg) {
+  WebScreenInfo results =
+      WebScreenInfoFactory::screenInfo(gfx::NativeViewFromId(view));
+  ViewHostMsg_GetScreenInfo::WriteReplyParams(reply_msg, results);
+  Send(reply_msg);
+}