[DevTools] Implementation of resource requests blocked by specific urls.

Source/core/loader/FrameFetchContext.cpp

Index: Source/core/loader/FrameFetchContext.cpp
diff --git a/Source/core/loader/FrameFetchContext.cpp b/Source/core/loader/FrameFetchContext.cpp
index c6dd2ae45a9409d4243cbb5cba14d695b5aa802a..be681ecea5e8c3849f8e2071d7afe94f4de85c32 100644
--- a/Source/core/loader/FrameFetchContext.cpp
+++ b/Source/core/loader/FrameFetchContext.cpp
@@ -44,7 +44,9 @@
 #include "core/html/imports/HTMLImportsController.h"
 #include "core/inspector/ConsoleMessage.h"
 #include "core/inspector/InspectorInstrumentation.h"
+#include "core/inspector/InspectorResourceAgent.h"
 #include "core/inspector/InspectorTraceEvents.h"
+#include "core/inspector/InstrumentingAgents.h"
 #include "core/loader/DocumentLoader.h"
 #include "core/loader/FrameLoader.h"
 #include "core/loader/FrameLoaderClient.h"
@@ -345,6 +347,12 @@ void FrameFetchContext::printAccessDeniedMessage(const KURL& url) const
 
 bool FrameFetchContext::canRequest(Resource::Type type, const ResourceRequest& resourceRequest, const KURL& url, const ResourceLoaderOptions& options, bool forPreload, FetchRequest::OriginRestriction originRestriction) const
 {
+    InstrumentingAgents* agents = InspectorInstrumentation::instrumentingAgentsFor(frame());
+    if (agents && agents->inspectorResourceAgent()) {
+        if (agents->inspectorResourceAgent()->shouldBlockRequest(resourceRequest))
+            return false;
+    }
+
     SecurityOrigin* securityOrigin = options.securityOrigin.get();
     if (!securityOrigin && m_document)
         securityOrigin = m_document->securityOrigin();