DevTools: Add scripts sourceURL plumbing from v8.

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 bc2d87d3d1958fc3d143213cbf3a5da27b2670a0..2b1d8b8948aa7653b684ce37c2752f7422696af7 100644
--- a/Source/core/inspector/InspectorDebuggerAgent.h
+++ b/Source/core/inspector/InspectorDebuggerAgent.h
@@ -215,7 +215,7 @@ private:
     PassRefPtr<TypeBuilder::Array<TypeBuilder::Debugger::CallFrame> > currentCallFrames();
     PassRefPtr<TypeBuilder::Debugger::StackTrace> currentAsyncStackTrace();
 
-    virtual void didParseSource(const String& scriptId, const Script&, CompileResult) OVERRIDE FINAL;
+    virtual void didParseSource(const String& scriptId, Script&, CompileResult) OVERRIDE FINAL;
     virtual void didReceiveV8AsyncTaskEvent(ExecutionContext*, const String& eventType, const String& eventName, int id) OVERRIDE FINAL;
 
     void setPauseOnExceptionsImpl(ErrorString*, int);
@@ -226,7 +226,7 @@ private:
     bool assertPaused(ErrorString*);
     void clearBreakDetails();
 
-    String sourceMapURLForScript(const Script&);
+    String sourceMapURLForScript(const Script&, CompileResult);
 
     String scriptURL(JavaScriptCallFrame*);