Move process-per-site logic from BrowsingInstance to RenderProcessHost.

chrome/browser/extensions/process_management_browsertest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/automation/automation_util.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/extensions/extension_host.h"
 #include "chrome/browser/extensions/extension_process_manager.h"
 #include "chrome/browser/extensions/extension_service.h"
@@ skipping 139 matching lines @@
   EXPECT_NE(isolated2_host, web1_host);
   EXPECT_NE(isolated2_host, extension1_host);
 
   // Everything else is clannish.  WebUI only shares with other WebUI.
   EXPECT_EQ(ntp1_host, ntp2_host);
   EXPECT_NE(ntp1_host, hosted1_host);
   EXPECT_NE(ntp1_host, web1_host);
   EXPECT_NE(ntp1_host, extension1_host);
 
   // Hosted apps only share with each other.
+  // Note that hosted2_host's app has the background permission and will use
+  // process-per-site mode, but it should still share with hosted1_host's app.
   EXPECT_EQ(hosted1_host, hosted2_host);
   EXPECT_NE(hosted1_host, web1_host);
   EXPECT_NE(hosted1_host, extension1_host);
 
   // Web pages only share with each other.
   EXPECT_EQ(web1_host, web2_host);
   EXPECT_NE(web1_host, extension1_host);
 
   // Extensions only share with each other.
   EXPECT_EQ(extension1_host, extension2_host);
@@ skipping 50 matching lines @@
        iter != epm->background_hosts().end(); ++iter) {
     process_ids.insert((*iter)->render_process_host()->GetID());
   }
 
   // We've loaded 5 extensions with background pages, 1 extension without
   // background page, and one isolated app. We expect only 2 unique processes
   // hosting those extensions.
   EXPECT_GE((size_t) 6, profile->GetExtensionService()->process_map()->size());
   EXPECT_EQ((size_t) 2, process_ids.size());
 }