Convert extensions::ProcessMap to BrowserContextKeyedService

extensions/browser/process_map.h

 // Copyright 2013 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 EXTENSIONS_BROWSER_PROCESS_MAP_H_
 #define EXTENSIONS_BROWSER_PROCESS_MAP_H_
 
 #include <set>
 #include <string>
 
 #include "base/basictypes.h"
+#include "components/browser_context_keyed_service/browser_context_keyed_service.h"
+
+namespace content {
+class BrowserContext;
+}
 
 namespace extensions {
 
 // Contains information about which extensions are assigned to which processes.
 //
 // The relationship between extensions and processes is complex:
 //
 // - Extensions can be either "split" mode or "spanning" mode.
 // - In spanning mode, extensions share a single process between all incognito
 //   and normal windows. This was the original mode for extensions.
@@ skipping 32 matching lines @@
 //    care about incognito version of this extension (or vice versa if you're in
 //    an incognito profile) then use
 //    extensions::ProcessManager::GetSiteInstanceForURL()->[Has|Get]Process().
 //
 // 3. The process ids contained in this class are *not limited* to the Profile
 //    you got this map from. They can also be associated with that profile's
 //    incognito/normal twin. If you care about this, use
 //    RenderProcessHost::FromID() and check the profile of the resulting object.
 //
 // TODO(aa): The above warnings suggest this class could use improvement :).
-class ProcessMap {
+class ProcessMap : public BrowserContextKeyedService {
  public:
   ProcessMap();
-  ~ProcessMap();
+  virtual ~ProcessMap();
+
+  // Returns the instance for |browser_context|. An instance is shared between
+  // an incognito and a regular context.
+  static ProcessMap* Get(content::BrowserContext* browser_context);
 
   size_t size() const { return items_.size(); }
 
   bool Insert(const std::string& extension_id, int process_id,
               int site_instance_id);
 
   bool Remove(const std::string& extension_id, int process_id,
               int site_instance_id);
   int RemoveAllFromProcess(int process_id);
 
   bool Contains(const std::string& extension_id, int process_id) const;
   bool Contains(int process_id) const;
 
   std::set<std::string> GetExtensionsInProcess(int process_id) const;
 
  private:
   struct Item;
 
   typedef std::set<Item> ItemSet;
   ItemSet items_;
 
   DISALLOW_COPY_AND_ASSIGN(ProcessMap);
 };
 
-}  // extensions
+}  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_PROCESS_MAP_H_