fix bug 331430, new pop-up blocker shifts scrollbar down. also fixes bug 331913, highlighted text for a scrolling find is below viewport when popup blocker is open. sr=pink

camino/src/browser/BrowserWrapper.mm

@@ -257,7 +257,7 @@ static NSString* const kOfflineNotificationName = @"offlineModeChanged";
       NSRect browserFrame = [mBrowserView frame];
       browserFrame.origin.y = popupBlockFrame.size.height;
       browserFrame.size.width = bounds.size.width;
-      browserFrame.size.height = bounds.size.height;
+      browserFrame.size.height = bounds.size.height-popupBlockFrame.size.height;
       
       popupBlockFrame.origin = NSZeroPoint;
       popupBlockFrame.size.width = bounds.size.width;