DevTools: pass agent host id to the renderer (Blink).

Source/core/inspector/InspectorResourceAgent.cpp

Index: Source/core/inspector/InspectorResourceAgent.cpp
diff --git a/Source/core/inspector/InspectorResourceAgent.cpp b/Source/core/inspector/InspectorResourceAgent.cpp
index c0a886b5457ee3545a02aff620db9128044ef3ae..12e2baa770a919e5af5510a3ed5b08b2f1e070ff 100644
--- a/Source/core/inspector/InspectorResourceAgent.cpp
+++ b/Source/core/inspector/InspectorResourceAgent.cpp
@@ -793,6 +793,11 @@ void InspectorResourceAgent::frameClearedScheduledNavigation(LocalFrame* frame)
     m_frameNavigationInitiatorMap.remove(m_pageAgent->frameId(frame));
 }
 
+void InspectorResourceAgent::setHostId(const String& hostId)
+{
+    m_hostId = hostId;
+}
+
 bool InspectorResourceAgent::fetchResourceContent(LocalFrame* frame, const KURL& url, String* content, bool* base64Encoded)
 {
     // First try to fetch content from the cached resource.