Merge NOTIFICATION_RENDER_VIEW_HOST_CHANGED into NOTIFICATION_WEB_CONTENTS_SWAPPED.

chrome/browser/extensions/extension_process_manager.cc

Index: chrome/browser/extensions/extension_process_manager.cc
diff --git a/chrome/browser/extensions/extension_process_manager.cc b/chrome/browser/extensions/extension_process_manager.cc
index 1f8c9fb8e916a5a91aa6f6623354f9c3fbc8b8dc..d1ddbab867a547757fbcd557f47a95635b5af517 100644
--- a/chrome/browser/extensions/extension_process_manager.cc
+++ b/chrome/browser/extensions/extension_process_manager.cc
@@ -341,7 +341,7 @@ std::set<RenderViewHost*>
 }
 
 const Extension* ExtensionProcessManager::GetExtensionForRenderViewHost(
-    content::RenderViewHost* render_view_host) {
+    RenderViewHost* render_view_host) {
   if (!render_view_host->GetSiteInstance())
     return NULL;
 
@@ -636,22 +636,20 @@ void ExtensionProcessManager::Observe(
       // navigation away from an extension URL). For the replaced case, we must
       // unregister the old RVH so it doesn't count as an active view that would
       // keep the event page alive.
-      content::WebContents* contents =
-          content::Source<content::WebContents>(source).ptr();
+      WebContents* contents = content::Source<WebContents>(source).ptr();
       if (contents->GetBrowserContext() != GetProfile())
         break;
 
-      content::RenderViewHost* old_render_view_host =
-          content::Details<content::RenderViewHost>(details).ptr();
-      if (old_render_view_host)
-        UnregisterRenderViewHost(old_render_view_host);
-      RegisterRenderViewHost(contents->GetRenderViewHost());
+      typedef std::pair<RenderViewHost*, RenderViewHost*> RVHPair;
+      RVHPair* switched_details = content::Details<RVHPair>(details).ptr();
+      if (switched_details->first)
+        UnregisterRenderViewHost(switched_details->first);
+      RegisterRenderViewHost(switched_details->second);
       break;
     }
 
     case content::NOTIFICATION_WEB_CONTENTS_CONNECTED: {
-      content::WebContents* contents =
-          content::Source<content::WebContents>(source).ptr();
+      WebContents* contents = content::Source<WebContents>(source).ptr();
       if (contents->GetBrowserContext() != GetProfile())
         break;
       const Extension* extension = GetExtensionForRenderViewHost(
@@ -683,7 +681,7 @@ void ExtensionProcessManager::Observe(
 
 void ExtensionProcessManager::OnDevToolsStateChanged(
     content::DevToolsAgentHost* agent_host, bool attached) {
-  content::RenderViewHost* rvh = agent_host->GetRenderViewHost();
+  RenderViewHost* rvh = agent_host->GetRenderViewHost();
   // Ignore unrelated notifications.
   if (!rvh ||
       rvh->GetSiteInstance()->GetProcess()->GetBrowserContext() != GetProfile())