DevTools: Initial implementation of line-level CPU profile.

third_party/WebKit/Source/devtools/front_end/sources/UISourceCodeFrame.js

Index: third_party/WebKit/Source/devtools/front_end/sources/UISourceCodeFrame.js
diff --git a/third_party/WebKit/Source/devtools/front_end/sources/UISourceCodeFrame.js b/third_party/WebKit/Source/devtools/front_end/sources/UISourceCodeFrame.js
index df56d748899a2be33b825c6110a4fb8679790baa..005f6d481338e5f33111aaa57d8de31c132cd1c8 100644
--- a/third_party/WebKit/Source/devtools/front_end/sources/UISourceCodeFrame.js
+++ b/third_party/WebKit/Source/devtools/front_end/sources/UISourceCodeFrame.js
@@ -41,6 +41,7 @@ WebInspector.UISourceCodeFrame = function(uiSourceCode)
     this._uiSourceCode.addEventListener(WebInspector.UISourceCode.Events.WorkingCopyCommitted, this._onWorkingCopyCommitted, this);
     this._uiSourceCode.addEventListener(WebInspector.UISourceCode.Events.MessageAdded, this._onMessageAdded, this);
     this._uiSourceCode.addEventListener(WebInspector.UISourceCode.Events.MessageRemoved, this._onMessageRemoved, this);
+    this._uiSourceCode.addEventListener(WebInspector.UISourceCode.Events.LineMarkersChanged, this._updateMarkerDecorations, this);
     this._updateStyle();
 
     this._errorPopoverHelper = new WebInspector.PopoverHelper(this.element, this._getErrorAnchor.bind(this), this._showErrorPopover.bind(this));
@@ -118,6 +119,7 @@ WebInspector.UISourceCodeFrame.prototype = {
         WebInspector.SourceFrame.prototype.onTextEditorContentLoaded.call(this);
         for (var message of this._uiSourceCode.messages())
             this._addMessageToSource(message);
+        this._updateMarkerDecorations();
     },
 
     /**
@@ -330,6 +332,21 @@ WebInspector.UISourceCodeFrame.prototype = {
         }
     },
 
+    _updateMarkerDecorations: function()
+    {
+        this._textEditor.removeAllLineMarkers();

[pfeldman, 2016/03/02 19:48:59]

Should we make this granular?

then you would go over the WebInspector.UISourceCodeFrame.Decorator extensions,
filter them by the granular decoration type and invoke it with the code mirror
in hand.

[alph, 2016/03/03 02:02:52]

Done.

+        var lineMarkers = this._uiSourceCode.lineMarkers();
+        if (!lineMarkers)
+            return;
+        for (var marker of lineMarkers) {
+            var lineNumber = marker.line();
+            var element = createElementWithClass("div", "text-editor-line-marker");
+            element.textContent = marker.text();
+            element.style.backgroundColor = marker.color();
+            this._textEditor.addLineMarker(lineNumber, element);
+        }
+    },
+
     __proto__: WebInspector.SourceFrame.prototype
 }