Resume a backgrounded renderer that was purged and suspended

content/public/browser/render_process_host.h

Index: content/public/browser/render_process_host.h
diff --git a/content/public/browser/render_process_host.h b/content/public/browser/render_process_host.h
index fd4805219d9a612c85ffa403d3f224fc6f9c4512..1938cce69c4a70dc6398cc8f48edaf4fb134d418 100644
--- a/content/public/browser/render_process_host.h
+++ b/content/public/browser/render_process_host.h
@@ -310,6 +310,15 @@ class CONTENT_EXPORT RenderProcessHost : public IPC::Sender,
   // Purges and suspends the renderer process.
   virtual void PurgeAndSuspend() = 0;
 
+  // Resumes the renderer process.
+  virtual void Resume() = 0;
+
+  // Gets the last time when the renderer process is purged and suspended.
+  virtual const base::TimeTicks& GetLastPurgedAndSuspendedTime() const = 0;
+
+  // Gets the last time when the renderer process is resumed in the background.
+  virtual const base::TimeTicks& GetLastResumedInBackgroundTime() const = 0;
+
   // Returns the current number of active views in this process.  Excludes
   // any RenderViewHosts that are swapped out.
   size_t GetActiveViewCount();