Replace web_cache_messages.h with Mojo service.

components/web_cache/renderer/web_cache_render_process_observer.h

 // Copyright 2014 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 COMPONENTS_WEB_CACHE_RENDERER_WEB_CACHE_RENDER_PROCESS_OBSERVER_H_
 #define COMPONENTS_WEB_CACHE_RENDERER_WEB_CACHE_RENDER_PROCESS_OBSERVER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
+#include "components/web_cache/public/interfaces/web_cache_service.mojom.h"
 #include "content/public/renderer/render_process_observer.h"
+#include "mojo/public/cpp/bindings/weak_binding_set.h"
 
 namespace web_cache {
 
-// This class filters the incoming cache related control messages.
-class WebCacheRenderProcessObserver : public content::RenderProcessObserver {
+using mojom::WebCacheService;
+
+// This class implements the Mojo interface WebCacheService.
+class WebCacheRenderProcessObserver : public WebCacheService,
+                                      public content::RenderProcessObserver {
  public:
   WebCacheRenderProcessObserver();
   ~WebCacheRenderProcessObserver() override;
 
+  void BindRequest(mojo::InterfaceRequest<WebCacheService> web_cache_request);
+
   // Needs to be called by RenderViews in case of navigations to execute
   // any 'clear cache' commands that were delayed until the next navigation.
   void ExecutePendingClearCache();
 
  private:
   // RenderProcessObserver implementation.
-  bool OnControlMessageReceived(const IPC::Message& message) override;
   void WebKitInitialized() override;
   void OnRenderProcessShutdown() override;
 
-  // Message handlers.
-  void OnSetCacheCapacities(uint64_t min_dead_capacity,
-                            uint64_t max_dead_capacity,
-                            uint64_t capacity);
+  // WebCacheService methods:
+  void SetCacheCapacities(uint64_t min_dead_capacity,
+                          uint64_t max_dead_capacity,
+                          uint64_t capacity) override;
   // If |on_navigation| is true, the clearing is delayed until the next
   // navigation event.
-  void OnClearCache(bool on_navigation);
+  void ClearCache(bool on_navigation) override;
 
   // If true, the web cache shall be cleared before the next navigation event.
   bool clear_cache_pending_;
   bool webkit_initialized_;
   size_t pending_cache_min_dead_capacity_;
   size_t pending_cache_max_dead_capacity_;
   size_t pending_cache_capacity_;
 
+  mojo::WeakBindingSet<WebCacheService> bindings_;
+
   DISALLOW_COPY_AND_ASSIGN(WebCacheRenderProcessObserver);
 };
 
 }  // namespace web_cache
 
 #endif  // COMPONENTS_WEB_CACHE_RENDERER_WEB_CACHE_RENDER_PROCESS_OBSERVER_H_