DevTools: promisify ContentProvider.requestContent and all its clients.

third_party/WebKit/LayoutTests/http/tests/inspector/debugger-test.js

 function scheduleTestFunction()
 {
     setTimeout(testFunction, 0);
 }
 
 var initialize_DebuggerTest = function() {
 
 InspectorTest.preloadPanel("sources");
 
 InspectorTest.startDebuggerTest = function(callback, quiet)
@@ skipping 349 matching lines @@
     panel.showUISourceCode(uiSourceCode);
     var sourceFrame = panel.visibleView;
     if (sourceFrame.loaded)
         callback(sourceFrame);
     else
         InspectorTest.addSniffer(sourceFrame, "onTextEditorContentLoaded", callback && callback.bind(null, sourceFrame));
 };
 
 InspectorTest.showScriptSource = function(scriptName, callback)
 {
-    InspectorTest.waitForScriptSource(scriptName, function(uiSourceCode) { InspectorTest.showUISourceCode(uiSourceCode, callback); });
+    InspectorTest.waitForScriptSource(scriptName, onScriptSource);
+
+    function onScriptSource(uiSourceCode)
+    {
+        InspectorTest.showUISourceCode(uiSourceCode, callback);
+    }
 };
 
 InspectorTest.waitForScriptSource = function(scriptName, callback)
 {
     var panel = WebInspector.panels.sources;
     var uiSourceCodes = panel._workspace.uiSourceCodes();
     for (var i = 0; i < uiSourceCodes.length; ++i) {
         if (uiSourceCodes[i].project().type() === WebInspector.projectTypes.Service)
             continue;
         if (uiSourceCodes[i].name() === scriptName) {
@@ skipping 120 matching lines @@
 InspectorTest.createScriptMock = function(url, startLine, startColumn, isContentScript, source, target, preRegisterCallback)
 {
     target = target || WebInspector.targetManager.mainTarget();
     var debuggerModel = WebInspector.DebuggerModel.fromTarget(target);
     var scriptId = ++InspectorTest._lastScriptId + "";
     var lineCount = source.lineEndings().length;
     var endLine = startLine + lineCount - 1;
     var endColumn = lineCount === 1 ? startColumn + source.length : source.length - source.lineEndings()[lineCount - 2];
     var hasSourceURL = !!source.match(/\/\/#\ssourceURL=\s*(\S*?)\s*$/m);
     var script = new WebInspector.Script(debuggerModel, scriptId, url, startLine, startColumn, endLine, endColumn, 0, isContentScript, false, false, undefined, hasSourceURL);
-    script.requestContent = function(callback)
+    script.requestContent = function()
     {
         var trimmedSource = WebInspector.Script._trimSourceURLComment(source);
-        callback(trimmedSource, false, "text/javascript");
+        return Promise.resolve(trimmedSource);
     };
     if (preRegisterCallback)
         preRegisterCallback(script);
     debuggerModel._registerScript(script);
     return script;
 };
 
 InspectorTest._lastScriptId = 0;
 
 InspectorTest.checkRawLocation = function(script, lineNumber, columnNumber, location)
@@ skipping 38 matching lines @@
 }
 
 InspectorTest.selectThread = function(target)
 {
     var threadsPane = WebInspector.panels.sources.sidebarPanes.threads;
     var listItem = threadsPane._debuggerModelToListItems.get(WebInspector.DebuggerModel.fromTarget(target));
     threadsPane._onListItemClick(listItem);
 }
 
 };