Inject timestamps to resource messages.

content/renderer/devtools/devtools_agent_filter.cc

Index: content/renderer/devtools/devtools_agent_filter.cc
diff --git a/content/renderer/devtools/devtools_agent_filter.cc b/content/renderer/devtools/devtools_agent_filter.cc
index 76062d9070a20f14e0dc9c87d61318d495b410ea..40a4b08fb2a6859e8a85422a4df8b50754da94c3 100644
--- a/content/renderer/devtools/devtools_agent_filter.cc
+++ b/content/renderer/devtools/devtools_agent_filter.cc
@@ -7,6 +7,8 @@
 #include "base/bind.h"
 #include "base/message_loop.h"
 #include "content/common/devtools_messages.h"
+#include "content/common/resource_dispatcher.h"
+#include "content/common/resource_messages.h"
 #include "content/renderer/devtools/devtools_agent.h"
 #include "content/renderer/plugin_channel_host.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebString.h"
@@ -40,12 +42,25 @@ class MessageImpl : public WebDevToolsAgent::MessageDescriptor {
 
 }  // namespace
 
-DevToolsAgentFilter::DevToolsAgentFilter()
-    : message_handled_(false),
+DevToolsAgentFilter::DevToolsAgentFilter(
+    ResourceDispatcher* resource_dispatcher)
+    : resource_dispatcher_(resource_dispatcher),
+      message_handled_(false),
       render_thread_loop_(base::MessageLoop::current()),
       current_routing_id_(0) {}
 
 bool DevToolsAgentFilter::OnMessageReceived(const IPC::Message& message) {
+  // Supply resource messages with IO timestamp.
+  if (message.type() == ResourceMsg_RequestComplete::ID ||
+      message.type() == ResourceMsg_ReceivedResponse::ID ||
+      message.type() == ResourceMsg_ReceivedRedirect::ID) {
+    render_thread_loop_->PostTask(FROM_HERE, base::Bind(
+        &ResourceDispatcher::set_io_timestamp,
+        base::Unretained(resource_dispatcher_),
+        base::TimeTicks::Now()));
+    return false;
+  }
+
   // Dispatch debugger commands directly from IO.
   message_handled_ = true;
   current_routing_id_ = message.routing_id();