Update the metrics side bar pane and computed style pane after main frame resize.

Source/devtools/front_end/ResourceTreeModel.js

Index: Source/devtools/front_end/ResourceTreeModel.js
diff --git a/Source/devtools/front_end/ResourceTreeModel.js b/Source/devtools/front_end/ResourceTreeModel.js
index c415cffaf0e350a92a8f8b8c28dd44b8e30fe004..7f01b032ad6f58e9d4d995c1a0b864f290ffa920 100644
--- a/Source/devtools/front_end/ResourceTreeModel.js
+++ b/Source/devtools/front_end/ResourceTreeModel.js
@@ -56,6 +56,7 @@ WebInspector.ResourceTreeModel.EventTypes = {
     FrameAdded: "FrameAdded",
     FrameNavigated: "FrameNavigated",
     FrameDetached: "FrameDetached",
+    FrameResized: "FrameResized",
     MainFrameNavigated: "MainFrameNavigated",
     MainFrameCreatedOrNavigated: "MainFrameCreatedOrNavigated",
     ResourceAdded: "ResourceAdded",
@@ -701,6 +702,11 @@ WebInspector.PageDispatcher.prototype = {
     {
     },
 
+    frameResized: function()
+    {
+        this._resourceTreeModel.dispatchEventToListeners(WebInspector.ResourceTreeModel.EventTypes.FrameResized, null);
+    },
+
     javascriptDialogOpening: function(message)
     {
     },