Support Promises instrumentation on backend.

Source/core/inspector/InspectorDebuggerAgent.h

Index: Source/core/inspector/InspectorDebuggerAgent.h
diff --git a/Source/core/inspector/InspectorDebuggerAgent.h b/Source/core/inspector/InspectorDebuggerAgent.h
index f44abcccea940fda9efb47f3473a28e736fbc58d..00b40c8221e11444832b2387d4b4333399e2256d 100644
--- a/Source/core/inspector/InspectorDebuggerAgent.h
+++ b/Source/core/inspector/InspectorDebuggerAgent.h
@@ -37,6 +37,7 @@
 #include "core/inspector/ConsoleAPITypes.h"
 #include "core/inspector/InjectedScript.h"
 #include "core/inspector/InspectorBaseAgent.h"
+#include "core/inspector/PromiseOfficer.h"
 #include "core/inspector/ScriptBreakpoint.h"
 #include "core/inspector/ScriptDebugListener.h"
 #include "wtf/Forward.h"
@@ -161,6 +162,9 @@ public:
     void didPostPromiseTask(ExecutionContext*, ExecutionContextTask*, bool isResolved);
     void willPerformPromiseTask(ExecutionContext*, ExecutionContextTask*);
     void didPerformPromiseTask();
+    void addPromise(ExecutionContext*, v8::Handle<v8::Object> promise, v8::Handle<v8::Object> parentPromise, V8PromiseCustom::PromiseState state);
+    void updatePromiseParent(ExecutionContext*, v8::Handle<v8::Object> promise, v8::Handle<v8::Object> newParentPromise);
+    void updatePromiseState(ExecutionContext*, v8::Handle<v8::Object> promise, V8PromiseCustom::PromiseState newState);
     bool canBreakProgram();
     void breakProgram(InspectorFrontend::Debugger::Reason::Enum breakReason, PassRefPtr<JSONObject> data);
     void scriptExecutionBlockedByCSP(const String& directiveText);
@@ -248,6 +252,7 @@ private:
     bool m_skipAllPauses;
     OwnPtr<ScriptRegexp> m_cachedSkipStackRegExp;
     AsyncCallStackTracker m_asyncCallStackTracker;
+    PromiseOfficer m_promiseOfficer;
 };
 
 } // namespace WebCore