Componentization: make InspectorTaskRunner::IgnoreInterruptsScope visible for WebDevToolsAgentImpl.

Source/core/inspector/InspectorTaskRunner.h

Index: Source/core/inspector/InspectorTaskRunner.h
diff --git a/Source/core/inspector/InspectorTaskRunner.h b/Source/core/inspector/InspectorTaskRunner.h
index c8c215f9aa88efc5fe5cde82db740aef5009b179..cd754dd9ec1a0cf6cf3a49c219739573f582837f 100644
--- a/Source/core/inspector/InspectorTaskRunner.h
+++ b/Source/core/inspector/InspectorTaskRunner.h
@@ -30,7 +30,7 @@ public:
     void interruptAndRun(PassOwnPtr<Task>);
     void runPendingTasks();
 
-    class IgnoreInterruptsScope final {
+    class CORE_EXPORT IgnoreInterruptsScope final {
     public:
         explicit IgnoreInterruptsScope(InspectorTaskRunner*);
         ~IgnoreInterruptsScope();