Linux: server side backing stores

chrome/browser/renderer_host/render_widget_host.h

Index: chrome/browser/renderer_host/render_widget_host.h
diff --git a/chrome/browser/renderer_host/render_widget_host.h b/chrome/browser/renderer_host/render_widget_host.h
index df0c417d79bb1e18c77e4b794dd49f91fc1f1379..31a467a99e4c8e5e1bc60cc8dc25995c469cf62d 100644
--- a/chrome/browser/renderer_host/render_widget_host.h
+++ b/chrome/browser/renderer_host/render_widget_host.h
@@ -174,6 +174,10 @@ class RenderWidgetHost : public IPC::Channel::Listener {
   // not be created.
   BackingStore* GetBackingStore();
 
+  // Allocate a new backing store of the given size. Returns NULL on failure
+  // (for example, if we don't currently have a RenderWidgetHostView.)
+  BackingStore* AllocBackingStore(const gfx::Size& size);
+
   // Checks to see if we can give up focus to this widget through a JS call.
   virtual bool CanBlur() const { return true; }