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

Source/core/inspector/InspectorResourceAgent.h

Index: Source/core/inspector/InspectorResourceAgent.h
diff --git a/Source/core/inspector/InspectorResourceAgent.h b/Source/core/inspector/InspectorResourceAgent.h
index f2fe916fe4e8c58b43e7c6d3f03d1dee26dfe145..fcf41d9424cb37dface55530cfa3d08ccc4112b0 100644
--- a/Source/core/inspector/InspectorResourceAgent.h
+++ b/Source/core/inspector/InspectorResourceAgent.h
@@ -83,6 +83,7 @@ public:
     DECLARE_VIRTUAL_TRACE();
 
     // Called from instrumentation.
+    bool shouldBlockRequest(const ResourceRequest&);

[pfeldman, 2015/08/21 01:38:45]

Can we make it the other way around where devtools would tell loader to block
some?

     void willSendRequest(unsigned long identifier, DocumentLoader*, ResourceRequest&, const ResourceResponse& redirectResponse, const FetchInitiatorInfo&);
     void markResourceAsCached(unsigned long identifier);
     void didReceiveResourceResponse(LocalFrame*, unsigned long identifier, DocumentLoader*, const ResourceResponse&, ResourceLoader*);
@@ -135,6 +136,8 @@ public:
     void setUserAgentOverride(ErrorString*, const String& userAgent) override;
     void setExtraHTTPHeaders(ErrorString*, const RefPtr<JSONObject>&) override;
     void getResponseBody(ErrorString*, const String& requestId, PassRefPtrWillBeRawPtr<GetResponseBodyCallback>) override;
+    void addBlockedURL(ErrorString*, const String& url) override;
+    void removeBlockedURL(ErrorString*, const String& url) override;
 
     void replayXHR(ErrorString*, const String& requestId) override;
     void setMonitoringXHREnabled(ErrorString*, bool) override;