DevTools: Implement CSS pretty-printing

Source/devtools/front_end/StylesSourceMapping.js

Index: Source/devtools/front_end/StylesSourceMapping.js
diff --git a/Source/devtools/front_end/StylesSourceMapping.js b/Source/devtools/front_end/StylesSourceMapping.js
index 1ca9186dd055d7efce6b3cf2c8d4d14d3168fb25..c39f07cd2dbc79ad60d51d43c197a309dd6eac48 100644
--- a/Source/devtools/front_end/StylesSourceMapping.js
+++ b/Source/devtools/front_end/StylesSourceMapping.js
@@ -207,6 +207,7 @@ WebInspector.StylesSourceMapping.prototype = {
 WebInspector.StyleFile = function(uiSourceCode)
 {
     this._uiSourceCode = uiSourceCode;
+    this._uiSourceCode.addEventListener(WebInspector.UISourceCode.Events.FormattedChanged, this._formattedChanged, this);
     this._uiSourceCode.addEventListener(WebInspector.UISourceCode.Events.WorkingCopyChanged, this._workingCopyChanged, this);
     this._uiSourceCode.addEventListener(WebInspector.UISourceCode.Events.WorkingCopyCommitted, this._workingCopyCommitted, this);
 }
@@ -216,6 +217,11 @@ WebInspector.StyleFile.updateTimeout = 200;
 WebInspector.StyleFile.sourceURLRegex = /\n[\040\t]*\/\*#[\040\t]sourceURL=[\040\t]*([^\s]*)[\040\t]*\*\/[\040\t]*$/m;
 
 WebInspector.StyleFile.prototype = {
+    _formattedChanged: function()
+    {
+        WebInspector.styleContentBinding.styleContentFormattingChanged(this._uiSourceCode);
+    },
+
     _workingCopyCommitted: function(event)
     {
         if (this._isAddingRevision)
@@ -278,6 +284,7 @@ WebInspector.StyleFile.prototype = {
     {
         this._uiSourceCode.removeEventListener(WebInspector.UISourceCode.Events.WorkingCopyCommitted, this._workingCopyCommitted, this);
         this._uiSourceCode.removeEventListener(WebInspector.UISourceCode.Events.WorkingCopyChanged, this._workingCopyChanged, this);
+        this._uiSourceCode.removeEventListener(WebInspector.UISourceCode.Events.FormattedChanged, this._formattedChanged, this);
     }
 }
 
@@ -295,6 +302,16 @@ WebInspector.StyleContentBinding = function(cssModel, workspace)
 WebInspector.StyleContentBinding.prototype = {
     /**
      * @param {WebInspector.UISourceCode} uiSourceCode
+     */
+    styleContentFormattingChanged: function(uiSourceCode)
+    {
+        var styleSheetIds = this._cssModel.styleSheetIdsForURL(uiSourceCode.url);
+        for (var i = 0; i < styleSheetIds.length; ++i)
+            this._cssModel.styleSheetHeaderForId(styleSheetIds[i]).updateLocations();
+    },
+
+    /**
+     * @param {WebInspector.UISourceCode} uiSourceCode
      * @param {string} content
      * @param {boolean} majorChange
      * @param {function(?string)} userCallback