DevTools: split text_utils out of common module

third_party/WebKit/LayoutTests/http/tests/inspector/page-mock.js

 var initialize_EmptyPageMock = function() {
 
 var id = 0;
 
 function nextId(prefix) {
     return (prefix || '') + (++id);
 }
 
 InspectorTest.connectToPage = function(targetName, pageMock, makeMainTarget) {
     var mockTarget = SDK.targetManager.createTarget(nextId('mock-target-'), targetName, pageMock.capabilities(), params => pageMock.createConnection(params));
@@ skipping 53 matching lines @@
         var id = nextId();
         content += '\n//# sourceURL=' + url;
         this._scriptContents.set(id, content);
 
         var context = this._executionContexts.find(context => context.auxData.isDefault !== isContentScript);
         if (!context) {
             context = this._createExecutionContext(this._mainFrame, isContentScript);
             this._fireEvent('Runtime.executionContextCreated', {context: context});
         }
 
-        var text = new Common.Text(content);
+        var text = new TextUtils.Text(content);
         var script = {
             scriptId: id,
             url: url,
             startLine: 0,
             startColumn: 0,
             endLine: text.lineCount(),
             endColumn: text.lineAt(text.lineCount()).length - 1,
             executionContextId: context.id,
             hash: String.hashCode(content),
             executionContextAuxData: context.auxData,
@@ skipping 155 matching lines @@
     disconnect() {
         this._onDisconnect.call(null, 'force disconnect');
         this._onDisconnect = null;
         this._onMessage = null;
         return Promise.resolve();
     }
 };
 
 };