Experimental: Fix HasWrongProcessForURL in --site-per-process mode.

content/browser/renderer_host/render_process_host_impl.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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #include <algorithm>
@@ skipping 1291 matching lines @@
 
 // static
 RenderProcessHost* RenderProcessHost::FromID(int render_process_id) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   return g_all_hosts.Get().Lookup(render_process_id);
 }
 
 // static
 bool RenderProcessHost::ShouldTryToUseExistingProcessHost(
     BrowserContext* browser_context, const GURL& url) {
+  // Experimental:
+  // If --enable-strict-site-isolation or --site-per-process is enabled, do not
+  // try to reuse renderer processes when over the limit.  (We could allow pages
+  // from the same site to share, if we knew what the given process was
+  // dedicated to.  Allowing no sharing is simpler for now.)  This may cause
+  // resource exhaustion issues if too many sites are open at once.
+  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
+  if (command_line.HasSwitch(switches::kEnableStrictSiteIsolation) ||
+      command_line.HasSwitch(switches::kSitePerProcess))
+    return false;
 
   if (run_renderer_in_process())
     return true;
 
   // NOTE: Sometimes it's necessary to create more render processes than
   //       GetMaxRendererProcessCount(), for instance when we want to create
   //       a renderer process for a browser context that has no existing
   //       renderers. This is OK in moderation, since the
   //       GetMaxRendererProcessCount() is conservative.
   if (g_all_hosts.Get().size() >= GetMaxRendererProcessCount())
@@ skipping 260 matching lines @@
       int32 gpu_process_host_id) {
   TRACE_EVENT0("renderer_host",
                "RenderWidgetHostImpl::OnCompositorSurfaceBuffersSwappedNoHost");
   RenderWidgetHostImpl::AcknowledgeBufferPresent(route_id,
                                                  gpu_process_host_id,
                                                  false,
                                                  0);
 }
 
 }  // namespace content