Allow custom inspector header for CORS preflight.

third_party/WebKit/Source/core/inspector/InspectorResourceAgent.cpp

Index: third_party/WebKit/Source/core/inspector/InspectorResourceAgent.cpp
diff --git a/third_party/WebKit/Source/core/inspector/InspectorResourceAgent.cpp b/third_party/WebKit/Source/core/inspector/InspectorResourceAgent.cpp
index 3540de2c00431707d7ab913f88d974a7bca488b8..aead12f75a92aa0b15e83ed261329d7fcd6947b0 100644
--- a/third_party/WebKit/Source/core/inspector/InspectorResourceAgent.cpp
+++ b/third_party/WebKit/Source/core/inspector/InspectorResourceAgent.cpp
@@ -50,6 +50,7 @@
 #include "core/inspector/ConsoleMessageStorage.h"
 #include "core/inspector/IdentifiersFactory.h"
 #include "core/inspector/InspectedFrames.h"
+#include "core/inspector/InspectorInstrumentation.h"
 #include "core/inspector/InstrumentingAgents.h"
 #include "core/inspector/NetworkResourcesData.h"
 #include "core/loader/DocumentLoader.h"
@@ -100,9 +101,6 @@ static size_t maximumResourceBufferSize = 10 * 1000 * 1000;
 
 namespace {
 
-// Keep in sync with kDevToolsRequestInitiator defined in devtools_network_controller.cc
-const char kDevToolsEmulateNetworkConditionsClientId[] = "X-DevTools-Emulate-Network-Conditions-Client-Id";
-
 // Pattern may contain stars ('*') which match to any (possibly empty) string.
 // Stars implicitly assumed at the begin/end of pattern.
 bool matches(const String& url, const String& pattern)
@@ -536,7 +534,7 @@ void InspectorResourceAgent::willSendRequest(LocalFrame* frame, unsigned long id
     willSendRequestInternal(frame, identifier, loader, request, redirectResponse, initiatorInfo);
 
     if (!m_hostId.isEmpty())
-        request.addHTTPHeaderField(kDevToolsEmulateNetworkConditionsClientId, AtomicString(m_hostId));
+        request.addHTTPHeaderField(InspectorInstrumentation::kInspectorEmulateNetworkConditionsClientId, AtomicString(m_hostId));
 }
 
 void InspectorResourceAgent::markResourceAsCached(unsigned long identifier)