Browser Plugin: Implement Back, Forward, and Go.

content/renderer/browser_plugin/browser_plugin.h

Index: content/renderer/browser_plugin/browser_plugin.h
diff --git a/content/renderer/browser_plugin/browser_plugin.h b/content/renderer/browser_plugin/browser_plugin.h
index 29f9b6dc55798dafa0286f5266877d4e6bdaa855..c943043e08ef1227e888e5d02fd90f4185b7761b 100644
--- a/content/renderer/browser_plugin/browser_plugin.h
+++ b/content/renderer/browser_plugin/browser_plugin.h
@@ -57,6 +57,15 @@ class CONTENT_EXPORT BrowserPlugin :
   // Remove a custom event listener from this BrowserPlugin instance.
   bool RemoveEventListener(const std::string& event_name,
                         v8::Local<v8::Function> function);
+  // Tells the BrowserPlugin to tell the guest to navigate to the previous
+  // navigation entry in the navigation history.
+  void Back();
+  // Tells the BrowserPlugin to tell the guest to navigate to the next
+  // navigation entry in the navigation history.
+  void Forward();
+  // Tells the BrowserPlugin to tell the guest to navigate to a position
+  // relative to the current index in its navigation history.
+  void Go(int relativeIndex);
 
   // WebKit::WebPlugin implementation.
   virtual WebKit::WebPluginContainer* container() const OVERRIDE;