Remove "open in new tab" items from context menu if the process doesn't

content/browser/child_process_security_policy.h

 // Copyright (c) 2011 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.
 
 #ifndef CONTENT_BROWSER_CHILD_PROCESS_SECURITY_POLICY_H_
 #define CONTENT_BROWSER_CHILD_PROCESS_SECURITY_POLICY_H_
 
 #pragma once
 
 #include <map>
 #include <set>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/singleton.h"
 #include "base/synchronization/lock.h"
 #include "content/common/content_export.h"
 
 class FilePath;
 class GURL;
 
+namespace net {
+
+class URLRequestJobFactory;
+
+}  // namespace net
+
 // The ChildProcessSecurityPolicy class is used to grant and revoke security
 // capabilities for child processes.  For example, it restricts whether a child
 // process is permitted to load file:// URLs based on whether the process
 // has ever been commanded to load file:// URLs by the browser.
 //
 // ChildProcessSecurityPolicy is a singleton that may be used on any thread.
 //
 class CONTENT_EXPORT ChildProcessSecurityPolicy {
  public:
   // Object can only be created through GetInstance() so the constructor is
   // private.
   ~ChildProcessSecurityPolicy();
 
   // There is one global ChildProcessSecurityPolicy object for the entire
   // browser process.  The object returned by this method may be accessed on
   // any thread.
   static ChildProcessSecurityPolicy* GetInstance();
 
   // Web-safe schemes can be requested by any child process.  Once a web-safe
   // scheme has been registered, any child process can request URLs with
   // that scheme.  There is no mechanism for revoking web-safe schemes.
   void RegisterWebSafeScheme(const std::string& scheme);
 
   // Returns true iff |scheme| has been registered as a web-safe scheme.
-  bool IsWebSafeScheme(const std::string& scheme);
+  bool IsWebSafeScheme(const std::string& scheme) const;
 
   // Pseudo schemes are treated differently than other schemes because they
   // cannot be requested like normal URLs.  There is no mechanism for revoking
   // pseudo schemes.
   void RegisterPseudoScheme(const std::string& scheme);
 
   // Returns true iff |scheme| has been registered as pseudo scheme.
-  bool IsPseudoScheme(const std::string& scheme);
+  bool IsPseudoScheme(const std::string& scheme) const;
 
   // Sets the list of disabled schemes.
   // URLs using these schemes won't be loaded at all. The previous list of
   // schemes is overwritten. An empty |schemes| disables this feature.
   // Schemes listed as disabled take precedence over Web-safe schemes.
   void RegisterDisabledSchemes(const std::set<std::string>& schemes);
 
   // Returns true iff |scheme| is listed as a disabled scheme.
-  bool IsDisabledScheme(const std::string& scheme);
+  bool IsDisabledScheme(const std::string& scheme) const;
 
   // Upon creation, child processes should register themselves by calling this
   // this method exactly once.
   void Add(int child_id);
 
   // Upon creation, worker thread child processes should register themselves by
   // calling this this method exactly once. Workers that are not shared will
   // inherit permissions from their parent renderer process identified with
   // |main_render_process_id|.
   void AddWorker(int worker_child_id, int main_render_process_id);
@@ skipping 33 matching lines @@
   void GrantWebUIBindings(int child_id);
 
   // Grant the child process the ability to read raw cookies.
   void GrantReadRawCookies(int child_id);
 
   // Revoke read raw cookies permission.
   void RevokeReadRawCookies(int child_id);
 
   // Before servicing a child process's request for a URL, the browser should
   // call this method to determine whether the process has the capability to
-  // request the URL.
-  bool CanRequestURL(int child_id, const GURL& url);
+  // request the URL.  Returns the true answer relative to the job_factory,
+  // and requires that we are running on the IO thread, which is the only
+  // place a true answer may be obtained. When not running on the IO thread,
+  // we can get an approximate answer by omitting the JobFactory. This result
+  // is relative to whatever tables are checked via ContentBrowserClient.
+  bool CanRequestURL(int child_id, const GURL& url,
+                     const net::URLRequestJobFactory* job_factory) const;
 
   // Before servicing a child process's request to upload a file to the web, the
   // browser should call this method to determine whether the process has the
   // capability to upload the requested file.
   bool CanReadFile(int child_id, const FilePath& file);
 
   // Before servicing a child process's request to enumerate a directory
   // the browser should call this method to check for the capability.
   bool CanReadDirectory(int child_id, const FilePath& directory);
 
@@ skipping 41 matching lines @@
   void AddChild(int child_id);
 
   // Determines if certain permissions were granted for a file to given child
   // process. |permissions| must be a bit-set of base::PlatformFileFlags.
   bool ChildProcessHasPermissionsForFile(int child_id,
                                          const FilePath& file,
                                          int permissions);
 
   // You must acquire this lock before reading or writing any members of this
   // class.  You must not block while holding this lock.
-  base::Lock lock_;
+  mutable base::Lock lock_;
 
   // These schemes are white-listed for all child processes.  This set is
   // protected by |lock_|.
   SchemeSet web_safe_schemes_;
 
   // These schemes do not actually represent retrievable URLs.  For example,
   // the the URLs in the "about" scheme are aliases to other URLs.  This set is
   // protected by |lock_|.
   SchemeSet pseudo_schemes_;
 
   // These schemes are disabled by policy, and child processes are always
   // denied permission to request them. This overrides |web_safe_schemes_|.
   // This set is protected by |lock_|.
   SchemeSet disabled_schemes_;
 
   // This map holds a SecurityState for each child process.  The key for the
   // map is the ID of the ChildProcessHost.  The SecurityState objects are
   // owned by this object and are protected by |lock_|.  References to them must
   // not escape this class.
   SecurityStateMap security_state_;
 
   // This maps keeps the record of which js worker thread child process
   // corresponds to which main js thread child process.
   WorkerToMainProcessMap worker_map_;
 
   DISALLOW_COPY_AND_ASSIGN(ChildProcessSecurityPolicy);
 };
 
 #endif  // CONTENT_BROWSER_CHILD_PROCESS_SECURITY_POLICY_H_