DevTools: [CodeMirror] remove auto-inserted whitespaces

Source/devtools/front_end/source_frame/CodeMirrorTextEditor.js

Index: Source/devtools/front_end/source_frame/CodeMirrorTextEditor.js
diff --git a/Source/devtools/front_end/source_frame/CodeMirrorTextEditor.js b/Source/devtools/front_end/source_frame/CodeMirrorTextEditor.js
index 8d6755e76878ea93a4928231960dc2f6c35540b4..f72cd5031e34b99f0409edad5ce3efe339c5c51b 100644
--- a/Source/devtools/front_end/source_frame/CodeMirrorTextEditor.js
+++ b/Source/devtools/front_end/source_frame/CodeMirrorTextEditor.js
@@ -248,6 +248,7 @@ CodeMirror.commands.smartNewlineAndIndent = function(codeMirror)
             replacements.push("\n" + indent.substring(0, Math.min(cur.ch, indent.length)));
         }
         codeMirror.replaceSelections(replacements);
+        codeMirror._codeMirrorTextEditor._onAutoAppendedSpaces();
     }
 }
 
@@ -325,6 +326,25 @@ WebInspector.CodeMirrorTextEditor.MaximumNumberOfWhitespacesPerSingleSpan = 16;
 WebInspector.CodeMirrorTextEditor.MaxEditableTextSize = 1024 * 1024 * 10;
 
 WebInspector.CodeMirrorTextEditor.prototype = {
+    _onAutoAppendedSpaces: function()
+    {
+        this._autoAppendedSpaces = this._autoAppendedSpaces || [];
+        for (var i = 0; i < this._autoAppendedSpaces.length; ++i) {
+            var position = this._autoAppendedSpaces[i].resolve();
+            if (!position)
+                continue;
+            var line = this.line(position.lineNumber);
+            if (line.length === position.columnNumber && WebInspector.TextUtils.lineIndent(line).length === line.length)
+                this._codeMirror.replaceRange("", new CodeMirror.Pos(position.lineNumber, 0), new CodeMirror.Pos(position.lineNumber, position.columnNumber));
+        }
+        this._autoAppendedSpaces = [];
+        var selections = this.selections();
+        for (var i = 0; i < selections.length; ++i) {
+            var selection = selections[i];
+            this._autoAppendedSpaces.push(this.textEditorPositionHandle(selection.startLine, selection.startColumn));
+        }
+    },
+
     /**
      * @param {number} lineNumber
      * @param {number} lineLength
@@ -1701,8 +1721,10 @@ WebInspector.CodeMirrorTextEditor.BlockIndentController.prototype = {
             allSelectionsAreCollapsedBlocks = isCollapsedBlock;
         }
         codeMirror.replaceSelections(replacements);
-        if (!allSelectionsAreCollapsedBlocks)
+        if (!allSelectionsAreCollapsedBlocks) {
+            codeMirror._codeMirrorTextEditor._onAutoAppendedSpaces();
             return;
+        }
         selections = codeMirror.listSelections();
         var updatedSelections = [];
         for (var i = 0; i < selections.length; ++i) {
@@ -1715,6 +1737,7 @@ WebInspector.CodeMirrorTextEditor.BlockIndentController.prototype = {
             });
         }
         codeMirror.setSelections(updatedSelections);
+        codeMirror._codeMirrorTextEditor._onAutoAppendedSpaces();
     },
 
     /**