Plumbing to support loading from the "most appropriate" appcache.

BUG=68479
Review URL: http://codereview.chromium.org/6667057

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@78934 0039d316-1c4b-4281-b951-d872f2087c98

7 files changed, 54 insertions, 7 deletions

diff --git a/content/browser/appcache/appcache_dispatcher_host.cc b/content/browser/appcache/appcache_dispatcher_host.cc
index e3f4430..7fefe39 100644
--- a/content/browser/appcache/appcache_dispatcher_host.cc
+++ b/content/browser/appcache/appcache_dispatcher_host.cc
@@ -63,6 +63,7 @@ bool AppCacheDispatcherHost::OnMessageReceived(const IPC::Message& message,
   IPC_BEGIN_MESSAGE_MAP_EX(AppCacheDispatcherHost, message, *message_was_ok)
     IPC_MESSAGE_HANDLER(AppCacheHostMsg_RegisterHost, OnRegisterHost)
     IPC_MESSAGE_HANDLER(AppCacheHostMsg_UnregisterHost, OnUnregisterHost)
+    IPC_MESSAGE_HANDLER(AppCacheHostMsg_SetSpawningHostId, OnSetSpawningHostId)
     IPC_MESSAGE_HANDLER(AppCacheHostMsg_GetResourceList, OnGetResourceList)
     IPC_MESSAGE_HANDLER(AppCacheHostMsg_SelectCache, OnSelectCache)
     IPC_MESSAGE_HANDLER(AppCacheHostMsg_SelectCacheForWorker,
@@ -101,6 +102,14 @@ void AppCacheDispatcherHost::OnUnregisterHost(int host_id) {
   }
 }
 
+void AppCacheDispatcherHost::OnSetSpawningHostId(
+    int host_id, int spawning_host_id) {
+  if (appcache_service_.get()) {
+    if (!backend_impl_.SetSpawningHostId(host_id, spawning_host_id))
+      BadMessageReceived();
+  }
+}
+
 void AppCacheDispatcherHost::OnSelectCache(
     int host_id, const GURL& document_url,
     int64 cache_document_was_loaded_from,
diff --git a/content/browser/appcache/appcache_dispatcher_host.h b/content/browser/appcache/appcache_dispatcher_host.h
index e6b9f34..010dad5 100644
--- a/content/browser/appcache/appcache_dispatcher_host.h
+++ b/content/browser/appcache/appcache_dispatcher_host.h
@@ -51,6 +51,7 @@ class AppCacheDispatcherHost : public BrowserMessageFilter {
   // IPC message handlers
   void OnRegisterHost(int host_id);
   void OnUnregisterHost(int host_id);
+  void OnSetSpawningHostId(int host_id, int spawning_host_id);
   void OnSelectCache(int host_id, const GURL& document_url,
                      int64 cache_document_was_loaded_from,
                      const GURL& opt_manifest_url);
diff --git a/content/common/appcache/appcache_backend_proxy.cc b/content/common/appcache/appcache_backend_proxy.cc
index be54b76..688b221 100644
--- a/content/common/appcache/appcache_backend_proxy.cc
+++ b/content/common/appcache/appcache_backend_proxy.cc
@@ -14,6 +14,12 @@ void AppCacheBackendProxy::UnregisterHost(int host_id) {
   sender_->Send(new AppCacheHostMsg_UnregisterHost(host_id));
 }
 
+void AppCacheBackendProxy::SetSpawningHostId(int host_id,
+                                             int spawning_host_id) {
+  sender_->Send(new AppCacheHostMsg_SetSpawningHostId(
+                                    host_id, spawning_host_id));
+}
+
 void AppCacheBackendProxy::SelectCache(
     int host_id,
     const GURL& document_url,
diff --git a/content/common/appcache/appcache_backend_proxy.h b/content/common/appcache/appcache_backend_proxy.h
index b05115e..af09abf 100644
--- a/content/common/appcache/appcache_backend_proxy.h
+++ b/content/common/appcache/appcache_backend_proxy.h
@@ -20,6 +20,7 @@ class AppCacheBackendProxy : public appcache::AppCacheBackend {
   // AppCacheBackend methods
   virtual void RegisterHost(int host_id);
   virtual void UnregisterHost(int host_id);
+  virtual void SetSpawningHostId(int host_id, int spawning_host_id);
   virtual void SelectCache(int host_id,
                            const GURL& document_url,
                            const int64 cache_document_was_loaded_from,
diff --git a/content/common/appcache_messages.h b/content/common/appcache_messages.h
index d14ffa8..d755e99 100644
--- a/content/common/appcache_messages.h
+++ b/content/common/appcache_messages.h
@@ -43,6 +43,14 @@ IPC_MESSAGE_CONTROL1(AppCacheHostMsg_RegisterHost,
 IPC_MESSAGE_CONTROL1(AppCacheHostMsg_UnregisterHost,
                      int /* host_id */)
 
+// Informs the browser of which host caused another to be created.
+// This can influence which appcache should be utilized for the main
+// resource load into the newly created host, so it should be sent
+// prior to the main resource request being initiated.
+IPC_MESSAGE_CONTROL2(AppCacheHostMsg_SetSpawningHostId,
+                     int /* host_id */,
+                     int /* spawning_host_id */)
+
 // Initiates the cache selection algorithm for the given host.
 // This is sent prior to any subresource loads. An AppCacheMsg_CacheSelected
 // message will be sent in response.
diff --git a/content/worker/worker_webapplicationcachehost_impl.cc b/content/worker/worker_webapplicationcachehost_impl.cc
index 45c75ed..734302c 100644
--- a/content/worker/worker_webapplicationcachehost_impl.cc
+++ b/content/worker/worker_webapplicationcachehost_impl.cc
@@ -21,7 +21,26 @@ WorkerWebApplicationCacheHostImpl::WorkerWebApplicationCacheHostImpl(
                                     init_info.parent_appcache_host_id);
 }
 
+void WorkerWebApplicationCacheHostImpl::willStartMainResourceRequest(
+    WebKit::WebURLRequest&, const WebKit::WebFrame*) {
+}
+
+void WorkerWebApplicationCacheHostImpl::didReceiveResponseForMainResource(
+    const WebKit::WebURLResponse&) {
+}
+
+void WorkerWebApplicationCacheHostImpl::didReceiveDataForMainResource(
+    const char*, int) {
+}
+
+void WorkerWebApplicationCacheHostImpl::didFinishLoadingMainResource(
+    bool) {
+}
+
+void WorkerWebApplicationCacheHostImpl::selectCacheWithoutManifest() {
+}
+
 bool WorkerWebApplicationCacheHostImpl::selectCacheWithManifest(
-    const WebKit::WebURL& manifestURL) {
+    const WebKit::WebURL&) {
   return true;
 }
diff --git a/content/worker/worker_webapplicationcachehost_impl.h b/content/worker/worker_webapplicationcachehost_impl.h
index db6dc8a..e356583 100644
--- a/content/worker/worker_webapplicationcachehost_impl.h
+++ b/content/worker/worker_webapplicationcachehost_impl.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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.
 
@@ -36,15 +36,18 @@ class WorkerWebApplicationCacheHostImpl
 
   // Main resource loading is different for workers. The resource is
   // loaded by the creator of the worker rather than the worker itself.
-  virtual void willStartMainResourceRequest(WebKit::WebURLRequest&) {}
+  // These overrides are stubbed out.
+  virtual void willStartMainResourceRequest(
+      WebKit::WebURLRequest&, const WebKit::WebFrame*);
   virtual void didReceiveResponseForMainResource(
-      const WebKit::WebURLResponse&) {}
-  virtual void didReceiveDataForMainResource(const char* data, int len) {}
-  virtual void didFinishLoadingMainResource(bool success) {}
+      const WebKit::WebURLResponse&);
+  virtual void didReceiveDataForMainResource(const char* data, int len);
+  virtual void didFinishLoadingMainResource(bool success);
 
   // Cache selection is also different for workers. We know at construction
   // time what cache to select and do so then.
-  virtual void selectCacheWithoutManifest() {}
+  // These overrides are stubbed out.
+  virtual void selectCacheWithoutManifest();
   virtual bool selectCacheWithManifest(const WebKit::WebURL& manifestURL);
 };