Upstreaming prerendering changes for Android.

chrome/browser/prerender/prerender_config.h

Index: chrome/browser/prerender/prerender_config.h
diff --git a/chrome/browser/prerender/prerender_config.h b/chrome/browser/prerender/prerender_config.h
index a9ca690c8f87597b82f90c1d2eb862c4a2d2f451..353670823c82bc30ff3b95ad1100bd635967078a 100644
--- a/chrome/browser/prerender/prerender_config.h
+++ b/chrome/browser/prerender/prerender_config.h
@@ -7,6 +7,7 @@
 #pragma once
 
 #include "base/time.h"
+#include "ui/gfx/rect.h"
 
 namespace prerender {
 
@@ -27,6 +28,10 @@ struct Config {
 
   // Is https allowed?
   bool https_allowed;
+
+  // The default tab bounds used as the prerenderer tab size when the active tab
+  // cannot be accessed.
+  gfx::Rect default_tab_bounds;
 };
 
 }  // namespace prerender