Add site_instance_id to ProcessMap::Item.

chrome/browser/chrome_content_browser_client.cc

Index: chrome/browser/chrome_content_browser_client.cc
diff --git a/chrome/browser/chrome_content_browser_client.cc b/chrome/browser/chrome_content_browser_client.cc
index 9e3e74ff8da6d44e43fe42bc2893d00747020bbd..24ba43a1da88240a709538fc3b3a3b6232cabc18 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -438,14 +438,16 @@ void ChromeContentBrowserClient::SiteInstanceGotProcess(
   if (!extension)
     return;
 
-  service->process_map()->Insert(
-      extension->id(), site_instance->GetProcess()->GetID());
+  service->process_map()->Insert(extension->id(),
+                                 site_instance->GetProcess()->GetID(),
+                                 site_instance->id());
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       base::Bind(&ExtensionInfoMap::RegisterExtensionProcess,
                  profile->GetExtensionInfoMap(),
                  extension->id(),
-                 site_instance->GetProcess()->GetID()));
+                 site_instance->GetProcess()->GetID(),
+                 site_instance->id()));
 }
 
 void ChromeContentBrowserClient::SiteInstanceDeleting(
@@ -466,14 +468,16 @@ void ChromeContentBrowserClient::SiteInstanceDeleting(
   if (!extension)
     return;
 
-  service->process_map()->Remove(
-      extension->id(), site_instance->GetProcess()->GetID());
+  service->process_map()->Remove(extension->id(),
+                                 site_instance->GetProcess()->GetID(),
+                                 site_instance->id());
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       base::Bind(&ExtensionInfoMap::UnregisterExtensionProcess,
                  profile->GetExtensionInfoMap(),
                  extension->id(),
-                 site_instance->GetProcess()->GetID()));
+                 site_instance->GetProcess()->GetID(),
+                 site_instance->id()));
 }
 
 bool ChromeContentBrowserClient::ShouldSwapProcessesForNavigation(