Create window in a new BrowsingInstance when opening a link in a new process.

content/browser/renderer_host/render_widget_helper.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 "content/browser/renderer_host/render_widget_helper.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/eintr_wrapper.h"
 #include "base/threading/thread.h"
@@ skipping 197 matching lines @@
 void RenderWidgetHelper::OnCrossSiteSwapOutACK(
     const ViewMsg_SwapOut_Params& params) {
   resource_dispatcher_host_->OnSwapOutACK(params);
 }
 
 void RenderWidgetHelper::CreateNewWindow(
     const ViewHostMsg_CreateWindow_Params& params,
     base::ProcessHandle render_process,
     int* route_id,
     int* surface_id) {
-  *route_id = GetNextRoutingID();
-  *surface_id = GpuSurfaceTracker::Get()->AddSurfaceForRenderer(
-      render_process_id_, *route_id);
-  // Block resource requests until the view is created, since the HWND might be
-  // needed if a response ends up creating a plugin.
-  resource_dispatcher_host_->BlockRequestsForRoute(
-      render_process_id_, *route_id);
+  if (params.opener_suppressed) {
+    // If the opener is supppressed, we should open the window in a new
+    // BrowsingInstance, and thus a new process.  That means the current
+    // renderer process will not be able to route messages to it.  Because of
+    // this, we will immediately show and navigate the window in
+    // OnCreateWindowOnUI, using the params provided here.
+    *route_id = MSG_ROUTING_NONE;
+    *surface_id = 0;
+  } else {
+    *route_id = GetNextRoutingID();
+    *surface_id = GpuSurfaceTracker::Get()->AddSurfaceForRenderer(
+        render_process_id_, *route_id);
+    // Block resource requests until the view is created, since the HWND might
+    // be needed if a response ends up creating a plugin.
+    resource_dispatcher_host_->BlockRequestsForRoute(
+        render_process_id_, *route_id);
+  }
 
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE,
       base::Bind(&RenderWidgetHelper::OnCreateWindowOnUI,
                  this, params, *route_id));
 }
 
 void RenderWidgetHelper::OnCreateWindowOnUI(
     const ViewHostMsg_CreateWindow_Params& params,
     int route_id) {
   RenderViewHostImpl* host =
       RenderViewHostImpl::FromID(render_process_id_, params.opener_id);
   if (host)
     host->CreateNewWindow(route_id, params);
 
-  BrowserThread::PostTask(
-      BrowserThread::IO, FROM_HERE,
-      base::Bind(&RenderWidgetHelper::OnCreateWindowOnIO, this, route_id));
+  // We only need to resume blocked requests if we used a valid route_id.
+  // See CreateNewWindow.
+  if (route_id != MSG_ROUTING_NONE) {
+    BrowserThread::PostTask(
+        BrowserThread::IO, FROM_HERE,
+        base::Bind(&RenderWidgetHelper::OnCreateWindowOnIO, this, route_id));
+  }
 }
 
 void RenderWidgetHelper::OnCreateWindowOnIO(int route_id) {
   resource_dispatcher_host_->ResumeBlockedRequestsForRoute(
       render_process_id_, route_id);
 }
 
 void RenderWidgetHelper::CreateNewWidget(int opener_id,
                                          WebKit::WebPopupType popup_type,
                                          int* route_id,
@@ skipping 86 matching lines @@
 void RenderWidgetHelper::ClearAllocatedDIBs() {
   for (std::map<TransportDIB::Id, int>::iterator
        i = allocated_dibs_.begin(); i != allocated_dibs_.end(); ++i) {
     if (HANDLE_EINTR(close(i->second)) < 0)
       PLOG(ERROR) << "close: " << i->first;
   }
 
   allocated_dibs_.clear();
 }
 #endif