Add mojo::StrongBindingSet and use it in GeolocationServiceContext.

content/browser/geolocation/geolocation_service_context.cc

 // 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.
 
 #include "content/browser/geolocation/geolocation_service_context.h"
 
+#include "content/public/common/geoposition.h"
+
 namespace content {
 
-GeolocationServiceContext::GeolocationServiceContext() : paused_(false) {
+DEFINE_WEB_CONTENTS_USER_DATA_KEY(GeolocationServiceContext);
+
+GeolocationServiceContext::GeolocationServiceContext(WebContents* web_contents)
+    : paused_(false) {}
+
+GeolocationServiceContext::~GeolocationServiceContext() {}
+
+// static
+GeolocationServiceContext* GeolocationServiceContext::GetOrCreateForWebContents(
+    WebContents* web_contents) {
+  CreateForWebContents(web_contents);
+  return FromWebContents(web_contents);
 }
 
-GeolocationServiceContext::~GeolocationServiceContext() {
+// static
+void GeolocationServiceContext::CreateService(
+    RenderFrameHost* render_frame_host,
+    mojo::InterfaceRequest<GeolocationService> request) {
+  WebContents* web_contents =
+      WebContents::FromRenderFrameHost(render_frame_host);
+  if (!web_contents)
+    return;
+
+  GeolocationServiceContext::GetOrCreateForWebContents(web_contents)
+      ->CreateServiceImpl(render_frame_host, std::move(request));
 }
 
-void GeolocationServiceContext::CreateService(
-    const base::Closure& update_callback,
+void GeolocationServiceContext::CreateServiceImpl(
+    RenderFrameHost* render_frame_host,
     mojo::InterfaceRequest<GeolocationService> request) {
   GeolocationServiceImpl* service =
-      new GeolocationServiceImpl(request.Pass(), this, update_callback);
-  services_.push_back(service);
+      services_.EmplaceService(std::move(request), this, render_frame_host);
   if (geoposition_override_)
-    service->SetOverride(*geoposition_override_.get());
+    service->OnOverrideSet();
   else
     service->StartListeningForUpdates();
 }
 
-void GeolocationServiceContext::ServiceHadConnectionError(
-    GeolocationServiceImpl* service) {
-  auto it = std::find(services_.begin(), services_.end(), service);
-  DCHECK(it != services_.end());
-  services_.erase(it);
-}
-
 void GeolocationServiceContext::PauseUpdates() {
   paused_ = true;
   for (auto* service : services_) {
     service->PauseUpdates();
   }
 }
 
 void GeolocationServiceContext::ResumeUpdates() {
   paused_ = false;
   for (auto* service : services_) {
     service->ResumeUpdates();
   }
 }
 
+void GeolocationServiceContext::DestroyService(
+    GeolocationServiceImpl* service) {
+  services_.DestroyService(service);
+}
+
 void GeolocationServiceContext::SetOverride(
     scoped_ptr<Geoposition> geoposition) {
   geoposition_override_.swap(geoposition);
   for (auto* service : services_) {
-    service->SetOverride(*geoposition_override_.get());
+    service->OnOverrideSet();
   }
 }
 
 void GeolocationServiceContext::ClearOverride() {
   for (auto* service : services_) {
     service->ClearOverride();
   }
+  geoposition_override_.reset();
 }
 
 }  // namespace content