Add service registration for apps APIs implemented as mojo services.

extensions/browser/extension_web_contents_observer.h

Index: extensions/browser/extension_web_contents_observer.h
diff --git a/extensions/browser/extension_web_contents_observer.h b/extensions/browser/extension_web_contents_observer.h
index 74cc5548f9bf2a2d64ecb91ce7cb3cdf975220e5..cd0a683019f08169b5c1f3369783c23dee61911c 100644
--- a/extensions/browser/extension_web_contents_observer.h
+++ b/extensions/browser/extension_web_contents_observer.h
@@ -5,6 +5,7 @@
 #ifndef EXTENSIONS_BROWSER_EXTENSION_WEB_CONTENTS_OBSERVER_H_
 #define EXTENSIONS_BROWSER_EXTENSION_WEB_CONTENTS_OBSERVER_H_
 
+#include <set>
 #include <string>
 
 #include "base/compiler_specific.h"
@@ -13,6 +14,7 @@
 
 namespace content {
 class BrowserContext;
+class RenderFrameHost;
 class RenderViewHost;
 class WebContents;
 }
@@ -37,6 +39,12 @@ class ExtensionWebContentsObserver : public content::WebContentsObserver {
 
   // content::WebContentsObserver overrides.
 
+  virtual void RenderFrameCreated(
+      content::RenderFrameHost* render_frame_host) override;
+
+  virtual void RenderFrameDeleted(
+      content::RenderFrameHost* render_frame_host) override;
+
   // A subclass should invoke this method to finish extension process setup.
   virtual void RenderViewCreated(content::RenderViewHost* render_view_host)
       override;
@@ -56,6 +64,9 @@ class ExtensionWebContentsObserver : public content::WebContentsObserver {
   // The BrowserContext associated with the WebContents being observed.
   content::BrowserContext* browser_context_;
 
+  // The set of RenderFrameHosts that we have seen be created, but not deleted.
+  std::set<content::RenderFrameHost*> known_render_frame_hosts_;
+
   DISALLOW_COPY_AND_ASSIGN(ExtensionWebContentsObserver);
 };