Wire sending/receiving cacheable metadata from the renderer

to the disk cache.

BUG=32407
TEST=None
Review URL: http://codereview.chromium.org/1698001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@47522 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 45 insertions, 3 deletions

diff --git a/chrome/browser/renderer_host/async_resource_handler.cc b/chrome/browser/renderer_host/async_resource_handler.cc
index a4a3494..30df3a2 100644
--- a/chrome/browser/renderer_host/async_resource_handler.cc
+++ b/chrome/browser/renderer_host/async_resource_handler.cc
@@ -124,6 +124,15 @@ bool AsyncResourceHandler::OnResponseStarted(int request_id,
 
   receiver_->Send(new ViewMsg_Resource_ReceivedResponse(
       routing_id_, request_id, response->response_head));
+
+  if (request->response_info().metadata) {
+    std::vector<char> copy(request->response_info().metadata->data(),
+                           request->response_info().metadata->data() +
+                           request->response_info().metadata->size());
+    receiver_->Send(new ViewMsg_Resource_ReceivedCachedMetadata(
+        routing_id_, request_id, copy));
+  }
+
   return true;
 }
 
diff --git a/chrome/browser/renderer_host/resource_message_filter.cc b/chrome/browser/renderer_host/resource_message_filter.cc
index d27ec21..7de83a7 100644
--- a/chrome/browser/renderer_host/resource_message_filter.cc
+++ b/chrome/browser/renderer_host/resource_message_filter.cc
@@ -548,6 +548,8 @@ bool ResourceMessageFilter::OnMessageReceived(const IPC::Message& msg) {
       IPC_MESSAGE_HANDLER(ViewHostMsg_CloseCurrentConnections,
                           OnCloseCurrentConnections)
       IPC_MESSAGE_HANDLER(ViewHostMsg_SetCacheMode, OnSetCacheMode)
+      IPC_MESSAGE_HANDLER(ViewHostMsg_DidGenerateCacheableMetadata,
+                          OnCacheableMetadataAvailable)
       IPC_MESSAGE_HANDLER_DELAY_REPLY(ViewHostMsg_GetFileSize, OnGetFileSize)
       IPC_MESSAGE_HANDLER_DELAY_REPLY(ViewHostMsg_GetFileModificationTime,
                                       OnGetFileModificationTime)
@@ -1300,7 +1302,7 @@ void ResourceMessageFilter::OnOpenChannelToTab(
   }
 }
 
-bool ResourceMessageFilter::CheckBenchmarkingEnabled() {
+bool ResourceMessageFilter::CheckBenchmarkingEnabled() const {
   static bool checked = false;
   static bool result = false;
   if (!checked) {
@@ -1332,6 +1334,34 @@ void ResourceMessageFilter::OnSetCacheMode(bool enabled) {
       http_transaction_factory()->GetCache()->set_mode(mode);
 }
 
+bool ResourceMessageFilter::CheckPreparsedJsCachingEnabled() const {
+  static bool checked = false;
+  static bool result = false;
+  if (!checked) {
+    const CommandLine& command_line = *CommandLine::ForCurrentProcess();
+    result = command_line.HasSwitch(switches::kEnablePreparsedJsCaching);
+    checked = true;
+  }
+  return result;
+}
+
+void ResourceMessageFilter::OnCacheableMetadataAvailable(
+    const GURL& url,
+    double expected_response_time,
+    const std::vector<char>& data) {
+  if (!CheckPreparsedJsCachingEnabled())
+    return;
+
+  net::HttpCache* cache = request_context_->GetURLRequestContext()->
+      http_transaction_factory()->GetCache();
+  DCHECK(cache);
+
+  scoped_refptr<net::IOBuffer> buf = new net::IOBuffer(data.size());
+  memcpy(buf->data(), &data.front(), data.size());
+  cache->WriteMetadata(
+      url, base::Time::FromDoubleT(expected_response_time), buf, data.size());
+}
+
 void ResourceMessageFilter::OnGetFileSize(const FilePath& path,
                                           IPC::Message* reply_msg) {
   // Get file size only when the child process has been granted permission to
diff --git a/chrome/browser/renderer_host/resource_message_filter.h b/chrome/browser/renderer_host/resource_message_filter.h
index e3e9ef6..76e1ea1 100644
--- a/chrome/browser/renderer_host/resource_message_filter.h
+++ b/chrome/browser/renderer_host/resource_message_filter.h
@@ -315,7 +315,9 @@ class ResourceMessageFilter : public IPC::ChannelProxy::MessageFilter,
 
   void OnCloseCurrentConnections();
   void OnSetCacheMode(bool enabled);
-
+  void OnCacheableMetadataAvailable(const GURL& url,
+                                    double expected_response_time,
+                                    const std::vector<char>& data);
   void OnGetFileSize(const FilePath& path, IPC::Message* reply_msg);
   void OnGetFileModificationTime(const FilePath& path, IPC::Message* reply_msg);
   void OnGetFileInfoOnFileThread(const FilePath& path,
@@ -352,7 +354,8 @@ class ResourceMessageFilter : public IPC::ChannelProxy::MessageFilter,
   void DoOnAllocateTempFileForPrinting(IPC::Message* reply_msg);
 #endif
 
-  bool CheckBenchmarkingEnabled();
+  bool CheckBenchmarkingEnabled() const;
+  bool CheckPreparsedJsCachingEnabled() const;
 
   // We have our own clipboard because we want to access the clipboard on the
   // IO thread instead of forwarding (possibly synchronous) messages to the UI