Replace web_cache_messages.h with Mojo service.

components/web_cache/renderer/web_cache_render_process_observer.h

Index: components/web_cache/renderer/web_cache_render_process_observer.h
diff --git a/components/web_cache/renderer/web_cache_render_process_observer.h b/components/web_cache/renderer/web_cache_render_process_observer.h
index 714ef231f2bb0134f0d83b3e06e24b1a7fbca4b9..17d1f8e920906d2c904c7fadf7284a562d99f640 100644
--- a/components/web_cache/renderer/web_cache_render_process_observer.h
+++ b/components/web_cache/renderer/web_cache_render_process_observer.h
@@ -10,33 +10,37 @@
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
+#include "components/web_cache/common/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 {
+// 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_;
@@ -45,6 +49,8 @@ class WebCacheRenderProcessObserver : public content::RenderProcessObserver {
   size_t pending_cache_max_dead_capacity_;
   size_t pending_cache_capacity_;
 
+  mojo::WeakBindingSet<WebCacheService> bindings_;
+
   DISALLOW_COPY_AND_ASSIGN(WebCacheRenderProcessObserver);
 };