Split ExtensionMessageFilter up into a UI thread part and an IO thread part.

extensions/browser/extension_function.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_EXTENSION_FUNCTION_H_
 #define EXTENSIONS_BROWSER_EXTENSION_FUNCTION_H_
 
 #include <list>
 #include <string>
 
@@ skipping 23 matching lines @@
 
 namespace content {
 class BrowserContext;
 class RenderFrameHost;
 class RenderViewHost;
 class WebContents;
 }
 
 namespace extensions {
 class ExtensionFunctionDispatcher;
-class ExtensionMessageFilter;
+class IOThreadExtensionMessageFilter;
 class QuotaLimitHeuristic;
 }
 
 namespace IPC {
 class Sender;
 }
 
 #ifdef NDEBUG
 #define EXTENSION_FUNCTION_VALIDATE(test) \
   do {                                    \
@@ skipping 461 matching lines @@
 // performance is critical (e.g. the webRequest API which can block network
 // requests). Generally, UIThreadExtensionFunction is more appropriate and will
 // be easier to use and interface with the rest of the browser.
 class IOThreadExtensionFunction : public ExtensionFunction {
  public:
   IOThreadExtensionFunction();
 
   IOThreadExtensionFunction* AsIOThreadExtensionFunction() override;
 
   void set_ipc_sender(
-      base::WeakPtr<extensions::ExtensionMessageFilter> ipc_sender,
+      base::WeakPtr<extensions::IOThreadExtensionMessageFilter> ipc_sender,
       int routing_id) {
     ipc_sender_ = ipc_sender;
     routing_id_ = routing_id;
   }
 
-  base::WeakPtr<extensions::ExtensionMessageFilter> ipc_sender_weak() const {
+  base::WeakPtr<extensions::IOThreadExtensionMessageFilter> ipc_sender_weak()
+      const {
     return ipc_sender_;
   }
 
   int routing_id() const { return routing_id_; }
 
   void set_extension_info_map(const extensions::InfoMap* extension_info_map) {
     extension_info_map_ = extension_info_map;
   }
   const extensions::InfoMap* extension_info_map() const {
     return extension_info_map_.get();
   }
 
  protected:
   friend struct content::BrowserThread::DeleteOnThread<
       content::BrowserThread::IO>;
   friend class base::DeleteHelper<IOThreadExtensionFunction>;
 
   ~IOThreadExtensionFunction() override;
 
   void Destruct() const override;
 
   void SendResponse(bool success) override;
 
  private:
-  base::WeakPtr<extensions::ExtensionMessageFilter> ipc_sender_;
+  base::WeakPtr<extensions::IOThreadExtensionMessageFilter> ipc_sender_;
   int routing_id_;
 
   scoped_refptr<const extensions::InfoMap> extension_info_map_;
 };
 
 // Base class for an extension function that runs asynchronously *relative to
 // the browser's UI thread*.
 class AsyncExtensionFunction : public UIThreadExtensionFunction {
  public:
   AsyncExtensionFunction();
@@ skipping 57 matching lines @@
   virtual bool RunSync() = 0;
 
   // ValidationFailure override to match RunSync().
   static bool ValidationFailure(SyncIOThreadExtensionFunction* function);
 
  private:
   ResponseAction Run() override;
 };
 
 #endif  // EXTENSIONS_BROWSER_EXTENSION_FUNCTION_H_