DevTools: reformat front-end code to match chromium style.

third_party/WebKit/Source/devtools/front_end/bindings/BreakpointManager.js

Index: third_party/WebKit/Source/devtools/front_end/bindings/BreakpointManager.js
diff --git a/third_party/WebKit/Source/devtools/front_end/bindings/BreakpointManager.js b/third_party/WebKit/Source/devtools/front_end/bindings/BreakpointManager.js
index 08003ee2a43bc99e18da35230b80d0eab8182f04..54823ef3e4cc10fdf589ae6ba7f2b894c1b134d7 100644
--- a/third_party/WebKit/Source/devtools/front_end/bindings/BreakpointManager.js
+++ b/third_party/WebKit/Source/devtools/front_end/bindings/BreakpointManager.js
@@ -27,18 +27,19 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
-
 /**
- * @constructor
- * @extends {WebInspector.Object}
  * @implements {WebInspector.TargetManager.Observer}
- * @param {?WebInspector.Setting} breakpointsSetting
- * @param {!WebInspector.Workspace} workspace
- * @param {!WebInspector.TargetManager} targetManager
- * @param {!WebInspector.DebuggerWorkspaceBinding} debuggerWorkspaceBinding
+ * @unrestricted
  */
-WebInspector.BreakpointManager = function(breakpointsSetting, workspace, targetManager, debuggerWorkspaceBinding)
-{
+WebInspector.BreakpointManager = class extends WebInspector.Object {
+  /**
+   * @param {?WebInspector.Setting} breakpointsSetting
+   * @param {!WebInspector.Workspace} workspace
+   * @param {!WebInspector.TargetManager} targetManager
+   * @param {!WebInspector.DebuggerWorkspaceBinding} debuggerWorkspaceBinding
+   */
+  constructor(breakpointsSetting, workspace, targetManager, debuggerWorkspaceBinding) {
+    super();
     this._storage = new WebInspector.BreakpointManager.Storage(this, breakpointsSetting);
     this._workspace = workspace;
     this._targetManager = targetManager;
@@ -52,427 +53,412 @@ WebInspector.BreakpointManager = function(breakpointsSetting, workspace, targetM
 
     this._workspace.addEventListener(WebInspector.Workspace.Events.ProjectRemoved, this._projectRemoved, this);
     this._workspace.addEventListener(WebInspector.Workspace.Events.UISourceCodeAdded, this._uiSourceCodeAdded, this);
-    this._workspace.addEventListener(WebInspector.Workspace.Events.UISourceCodeRemoved, this._uiSourceCodeRemoved, this);
+    this._workspace.addEventListener(
+        WebInspector.Workspace.Events.UISourceCodeRemoved, this._uiSourceCodeRemoved, this);
+  }
+
+  /**
+   * @param {string} sourceFileId
+   * @param {number} lineNumber
+   * @param {number} columnNumber
+   * @return {string}
+   */
+  static _breakpointStorageId(sourceFileId, lineNumber, columnNumber) {
+    if (!sourceFileId)
+      return '';
+    return sourceFileId + ':' + lineNumber + ':' + columnNumber;
+  }
+
+  /**
+   * @param {!WebInspector.UISourceCode} uiSourceCode
+   * @return {string}
+   */
+  _sourceFileId(uiSourceCode) {
+    // TODO(lushnikov): _sourceFileId is not needed any more.
+    return uiSourceCode.url();
+  }
+
+  /**
+   * @override
+   * @param {!WebInspector.Target} target
+   */
+  targetAdded(target) {
+    var debuggerModel = WebInspector.DebuggerModel.fromTarget(target);
+    if (debuggerModel && !this._breakpointsActive)
+      debuggerModel.setBreakpointsActive(this._breakpointsActive);
+  }
+
+  /**
+   * @override
+   * @param {!WebInspector.Target} target
+   */
+  targetRemoved(target) {
+  }
+
+  /**
+   * @param {string} sourceFileId
+   * @return {!Map.<string, !WebInspector.BreakpointManager.Breakpoint>}
+   */
+  _provisionalBreakpointsForSourceFileId(sourceFileId) {
+    var result = new Map();
+    var breakpoints = this._provisionalBreakpoints.get(sourceFileId).valuesArray();
+    for (var i = 0; i < breakpoints.length; ++i)
+      result.set(breakpoints[i]._breakpointStorageId(), breakpoints[i]);
+    return result;
+  }
+
+  removeProvisionalBreakpointsForTest() {
+    var breakpoints = this._provisionalBreakpoints.valuesArray();
+    for (var i = 0; i < breakpoints.length; ++i)
+      breakpoints[i].remove();
+    this._provisionalBreakpoints.clear();
+  }
+
+  /**
+   * @param {!WebInspector.UISourceCode} uiSourceCode
+   */
+  _restoreBreakpoints(uiSourceCode) {
+    var sourceFileId = this._sourceFileId(uiSourceCode);
+    if (!sourceFileId)
+      return;
+
+    this._storage.mute();
+    var breakpointItems = this._storage.breakpointItems(this._sourceFileId(uiSourceCode));
+    var provisionalBreakpoints = this._provisionalBreakpointsForSourceFileId(sourceFileId);
+    for (var i = 0; i < breakpointItems.length; ++i) {
+      var breakpointItem = breakpointItems[i];
+      var itemStorageId = WebInspector.BreakpointManager._breakpointStorageId(
+          breakpointItem.sourceFileId, breakpointItem.lineNumber, breakpointItem.columnNumber);
+      var provisionalBreakpoint = provisionalBreakpoints.get(itemStorageId);
+      if (provisionalBreakpoint) {
+        if (!this._breakpointsForPrimaryUISourceCode.get(uiSourceCode))
+          this._breakpointsForPrimaryUISourceCode.set(uiSourceCode, []);
+        this._breakpointsForPrimaryUISourceCode.get(uiSourceCode).push(provisionalBreakpoint);
+        provisionalBreakpoint._updateBreakpoint();
+      } else {
+        this._innerSetBreakpoint(
+            uiSourceCode, breakpointItem.lineNumber, breakpointItem.columnNumber, breakpointItem.condition,
+            breakpointItem.enabled);
+      }
+    }
+    this._provisionalBreakpoints.removeAll(sourceFileId);
+    this._storage.unmute();
+  }
+
+  /**
+   * @param {!WebInspector.Event} event
+   */
+  _uiSourceCodeAdded(event) {
+    var uiSourceCode = /** @type {!WebInspector.UISourceCode} */ (event.data);
+    this._restoreBreakpoints(uiSourceCode);
+    if (uiSourceCode.contentType().hasScripts())
+      uiSourceCode.addEventListener(
+          WebInspector.UISourceCode.Events.SourceMappingChanged, this._uiSourceCodeMappingChanged, this);
+  }
+
+  /**
+   * @param {!WebInspector.Event} event
+   */
+  _uiSourceCodeRemoved(event) {
+    var uiSourceCode = /** @type {!WebInspector.UISourceCode} */ (event.data);
+    this._removeUISourceCode(uiSourceCode);
+  }
+
+  /**
+   * @param {!WebInspector.Event} event
+   */
+  _uiSourceCodeMappingChanged(event) {
+    var uiSourceCode = /** @type {!WebInspector.UISourceCode} */ (event.target);
+    var isIdentity = /** @type {boolean} */ (event.data.isIdentity);
+    var target = /** @type {!WebInspector.Target} */ (event.data.target);
+    if (isIdentity)
+      return;
+    var breakpoints = this._breakpointsForPrimaryUISourceCode.get(uiSourceCode) || [];
+    for (var i = 0; i < breakpoints.length; ++i)
+      breakpoints[i]._updateInDebuggerForTarget(target);
+  }
+
+  /**
+   * @param {!WebInspector.UISourceCode} uiSourceCode
+   */
+  _removeUISourceCode(uiSourceCode) {
+    var breakpoints = this._breakpointsForPrimaryUISourceCode.get(uiSourceCode) || [];
+    var sourceFileId = this._sourceFileId(uiSourceCode);
+    for (var i = 0; i < breakpoints.length; ++i) {
+      breakpoints[i]._resetLocations();
+      if (breakpoints[i].enabled())
+        this._provisionalBreakpoints.set(sourceFileId, breakpoints[i]);
+    }
+    uiSourceCode.removeEventListener(
+        WebInspector.UISourceCode.Events.SourceMappingChanged, this._uiSourceCodeMappingChanged, this);
+    this._breakpointsForPrimaryUISourceCode.remove(uiSourceCode);
+  }
+
+  /**
+   * @param {!WebInspector.UISourceCode} uiSourceCode
+   * @param {number} lineNumber
+   * @param {number} columnNumber
+   * @param {string} condition
+   * @param {boolean} enabled
+   * @return {!WebInspector.BreakpointManager.Breakpoint}
+   */
+  setBreakpoint(uiSourceCode, lineNumber, columnNumber, condition, enabled) {
+    var uiLocation = new WebInspector.UILocation(uiSourceCode, lineNumber, columnNumber);
+    var normalizedLocation = this._debuggerWorkspaceBinding.normalizeUILocation(uiLocation);
+    if (normalizedLocation.id() !== uiLocation.id()) {
+      WebInspector.Revealer.reveal(normalizedLocation);
+      uiLocation = normalizedLocation;
+    }
+    this.setBreakpointsActive(true);
+    return this._innerSetBreakpoint(
+        uiLocation.uiSourceCode, uiLocation.lineNumber, uiLocation.columnNumber, condition, enabled);
+  }
+
+  /**
+   * @param {!WebInspector.UISourceCode} uiSourceCode
+   * @param {number} lineNumber
+   * @param {number} columnNumber
+   * @param {string} condition
+   * @param {boolean} enabled
+   * @return {!WebInspector.BreakpointManager.Breakpoint}
+   */
+  _innerSetBreakpoint(uiSourceCode, lineNumber, columnNumber, condition, enabled) {
+    var breakpoint = this.findBreakpoint(uiSourceCode, lineNumber, columnNumber);
+    if (breakpoint) {
+      breakpoint._updateState(condition, enabled);
+      return breakpoint;
+    }
+    var projectId = uiSourceCode.project().id();
+    var path = uiSourceCode.url();
+    var sourceFileId = this._sourceFileId(uiSourceCode);
+    breakpoint = new WebInspector.BreakpointManager.Breakpoint(
+        this, projectId, path, sourceFileId, lineNumber, columnNumber, condition, enabled);
+    if (!this._breakpointsForPrimaryUISourceCode.get(uiSourceCode))
+      this._breakpointsForPrimaryUISourceCode.set(uiSourceCode, []);
+    this._breakpointsForPrimaryUISourceCode.get(uiSourceCode).push(breakpoint);
+    return breakpoint;
+  }
+
+  /**
+   * @param {!WebInspector.UISourceCode} uiSourceCode
+   * @param {number} lineNumber
+   * @param {number} columnNumber
+   * @return {?WebInspector.BreakpointManager.Breakpoint}
+   */
+  findBreakpoint(uiSourceCode, lineNumber, columnNumber) {
+    var breakpoints = this._breakpointsForUISourceCode.get(uiSourceCode);
+    var lineBreakpoints = breakpoints ? breakpoints.get(String(lineNumber)) : null;
+    var columnBreakpoints = lineBreakpoints ? lineBreakpoints.get(String(columnNumber)) : null;
+    return columnBreakpoints ? columnBreakpoints[0] : null;
+  }
+
+  /**
+   * @param {!WebInspector.UISourceCode} uiSourceCode
+   * @param {number} lineNumber
+   * @return {?WebInspector.BreakpointManager.Breakpoint}
+   */
+  findBreakpointOnLine(uiSourceCode, lineNumber) {
+    var breakpoints = this._breakpointsForUISourceCode.get(uiSourceCode);
+    var lineBreakpoints = breakpoints ? breakpoints.get(String(lineNumber)) : null;
+    return lineBreakpoints ? lineBreakpoints.valuesArray()[0][0] : null;
+  }
+
+  /**
+   * @param {!WebInspector.UISourceCode} uiSourceCode
+   * @return {!Array.<!WebInspector.BreakpointManager.Breakpoint>}
+   */
+  breakpointsForUISourceCode(uiSourceCode) {
+    var result = [];
+    var uiSourceCodeBreakpoints = this._breakpointsForUISourceCode.get(uiSourceCode);
+    var breakpoints = uiSourceCodeBreakpoints ? uiSourceCodeBreakpoints.valuesArray() : [];
+    for (var i = 0; i < breakpoints.length; ++i) {
+      var lineBreakpoints = breakpoints[i];
+      var columnBreakpointArrays = lineBreakpoints ? lineBreakpoints.valuesArray() : [];
+      result = result.concat.apply(result, columnBreakpointArrays);
+    }
+    return result;
+  }
+
+  /**
+   * @return {!Array.<!WebInspector.BreakpointManager.Breakpoint>}
+   */
+  allBreakpoints() {
+    var result = [];
+    var uiSourceCodes = this._breakpointsForUISourceCode.keysArray();
+    for (var i = 0; i < uiSourceCodes.length; ++i)
+      result = result.concat(this.breakpointsForUISourceCode(uiSourceCodes[i]));
+    return result;
+  }
+
+  /**
+   * @param {!WebInspector.UISourceCode} uiSourceCode
+   * @return {!Array.<!{breakpoint: !WebInspector.BreakpointManager.Breakpoint, uiLocation: !WebInspector.UILocation}>}
+   */
+  breakpointLocationsForUISourceCode(uiSourceCode) {
+    var uiSourceCodeBreakpoints = this._breakpointsForUISourceCode.get(uiSourceCode);
+    var lineNumbers = uiSourceCodeBreakpoints ? uiSourceCodeBreakpoints.keysArray() : [];
+    var result = [];
+    for (var i = 0; i < lineNumbers.length; ++i) {
+      var lineBreakpoints = uiSourceCodeBreakpoints.get(lineNumbers[i]);
+      var columnNumbers = lineBreakpoints.keysArray();
+      for (var j = 0; j < columnNumbers.length; ++j) {
+        var columnBreakpoints = lineBreakpoints.get(columnNumbers[j]);
+        var lineNumber = parseInt(lineNumbers[i], 10);
+        var columnNumber = parseInt(columnNumbers[j], 10);
+        for (var k = 0; k < columnBreakpoints.length; ++k) {
+          var breakpoint = columnBreakpoints[k];
+          var uiLocation = uiSourceCode.uiLocation(lineNumber, columnNumber);
+          result.push({breakpoint: breakpoint, uiLocation: uiLocation});
+        }
+      }
+    }
+    return result;
+  }
+
+  /**
+   * @return {!Array.<!{breakpoint: !WebInspector.BreakpointManager.Breakpoint, uiLocation: !WebInspector.UILocation}>}
+   */
+  allBreakpointLocations() {
+    var result = [];
+    var uiSourceCodes = this._breakpointsForUISourceCode.keysArray();
+    for (var i = 0; i < uiSourceCodes.length; ++i)
+      result = result.concat(this.breakpointLocationsForUISourceCode(uiSourceCodes[i]));
+    return result;
+  }
+
+  /**
+   * @param {boolean} toggleState
+   */
+  toggleAllBreakpoints(toggleState) {
+    var breakpoints = this.allBreakpoints();
+    for (var i = 0; i < breakpoints.length; ++i)
+      breakpoints[i].setEnabled(toggleState);
+  }
+
+  removeAllBreakpoints() {
+    var breakpoints = this.allBreakpoints();
+    for (var i = 0; i < breakpoints.length; ++i)
+      breakpoints[i].remove();
+  }
+
+  _projectRemoved(event) {
+    var project = /** @type {!WebInspector.Project} */ (event.data);
+    var uiSourceCodes = project.uiSourceCodes();
+    for (var i = 0; i < uiSourceCodes.length; ++i)
+      this._removeUISourceCode(uiSourceCodes[i]);
+  }
+
+  /**
+   * @param {!WebInspector.BreakpointManager.Breakpoint} breakpoint
+   * @param {boolean} removeFromStorage
+   */
+  _removeBreakpoint(breakpoint, removeFromStorage) {
+    var uiSourceCode = breakpoint.uiSourceCode();
+    var breakpoints = uiSourceCode ? this._breakpointsForPrimaryUISourceCode.get(uiSourceCode) || [] : [];
+    breakpoints.remove(breakpoint);
+    if (removeFromStorage)
+      this._storage._removeBreakpoint(breakpoint);
+    this._provisionalBreakpoints.remove(breakpoint._sourceFileId, breakpoint);
+  }
+
+  /**
+   * @param {!WebInspector.BreakpointManager.Breakpoint} breakpoint
+   * @param {!WebInspector.UILocation} uiLocation
+   */
+  _uiLocationAdded(breakpoint, uiLocation) {
+    var breakpoints = this._breakpointsForUISourceCode.get(uiLocation.uiSourceCode);
+    if (!breakpoints) {
+      breakpoints = new Map();
+      this._breakpointsForUISourceCode.set(uiLocation.uiSourceCode, breakpoints);
+    }
+    var lineBreakpoints = breakpoints.get(String(uiLocation.lineNumber));
+    if (!lineBreakpoints) {
+      lineBreakpoints = new Map();
+      breakpoints.set(String(uiLocation.lineNumber), lineBreakpoints);
+    }
+    var columnBreakpoints = lineBreakpoints.get(String(uiLocation.columnNumber));
+    if (!columnBreakpoints) {
+      columnBreakpoints = [];
+      lineBreakpoints.set(String(uiLocation.columnNumber), columnBreakpoints);
+    }
+    columnBreakpoints.push(breakpoint);
+    this.dispatchEventToListeners(
+        WebInspector.BreakpointManager.Events.BreakpointAdded, {breakpoint: breakpoint, uiLocation: uiLocation});
+  }
+
+  /**
+   * @param {!WebInspector.BreakpointManager.Breakpoint} breakpoint
+   * @param {!WebInspector.UILocation} uiLocation
+   */
+  _uiLocationRemoved(breakpoint, uiLocation) {
+    var breakpoints = this._breakpointsForUISourceCode.get(uiLocation.uiSourceCode);
+    if (!breakpoints)
+      return;
+
+    var lineBreakpoints = breakpoints.get(String(uiLocation.lineNumber));
+    if (!lineBreakpoints)
+      return;
+    var columnBreakpoints = lineBreakpoints.get(String(uiLocation.columnNumber));
+    if (!columnBreakpoints)
+      return;
+    columnBreakpoints.remove(breakpoint);
+    if (!columnBreakpoints.length)
+      lineBreakpoints.remove(String(uiLocation.columnNumber));
+    if (!lineBreakpoints.size)
+      breakpoints.remove(String(uiLocation.lineNumber));
+    if (!breakpoints.size)
+      this._breakpointsForUISourceCode.remove(uiLocation.uiSourceCode);
+    this.dispatchEventToListeners(
+        WebInspector.BreakpointManager.Events.BreakpointRemoved, {breakpoint: breakpoint, uiLocation: uiLocation});
+  }
+
+  /**
+   * @param {boolean} active
+   */
+  setBreakpointsActive(active) {
+    if (this._breakpointsActive === active)
+      return;
+
+    this._breakpointsActive = active;
+    var debuggerModels = WebInspector.DebuggerModel.instances();
+    for (var i = 0; i < debuggerModels.length; ++i)
+      debuggerModels[i].setBreakpointsActive(active);
+
+    this.dispatchEventToListeners(WebInspector.BreakpointManager.Events.BreakpointsActiveStateChanged, active);
+  }
+
+  /**
+   * @return {boolean}
+   */
+  breakpointsActive() {
+    return this._breakpointsActive;
+  }
 };
 
 /** @enum {symbol} */
 WebInspector.BreakpointManager.Events = {
-    BreakpointAdded: Symbol("breakpoint-added"),
-    BreakpointRemoved: Symbol("breakpoint-removed"),
-    BreakpointsActiveStateChanged: Symbol("BreakpointsActiveStateChanged")
+  BreakpointAdded: Symbol('breakpoint-added'),
+  BreakpointRemoved: Symbol('breakpoint-removed'),
+  BreakpointsActiveStateChanged: Symbol('BreakpointsActiveStateChanged')
 };
 
-/**
- * @param {string} sourceFileId
- * @param {number} lineNumber
- * @param {number} columnNumber
- * @return {string}
- */
-WebInspector.BreakpointManager._breakpointStorageId = function(sourceFileId, lineNumber, columnNumber)
-{
-    if (!sourceFileId)
-        return "";
-    return sourceFileId + ":" + lineNumber + ":" + columnNumber;
-};
-
-WebInspector.BreakpointManager.prototype = {
-    /**
-     * @param {!WebInspector.UISourceCode} uiSourceCode
-     * @return {string}
-     */
-    _sourceFileId: function(uiSourceCode)
-    {
-        // TODO(lushnikov): _sourceFileId is not needed any more.
-        return uiSourceCode.url();
-    },
-
-    /**
-     * @override
-     * @param {!WebInspector.Target} target
-     */
-    targetAdded: function(target)
-    {
-        var debuggerModel = WebInspector.DebuggerModel.fromTarget(target);
-        if (debuggerModel && !this._breakpointsActive)
-            debuggerModel.setBreakpointsActive(this._breakpointsActive);
-    },
-
-    /**
-     * @override
-     * @param {!WebInspector.Target} target
-     */
-    targetRemoved: function(target) { },
-
-    /**
-     * @param {string} sourceFileId
-     * @return {!Map.<string, !WebInspector.BreakpointManager.Breakpoint>}
-     */
-    _provisionalBreakpointsForSourceFileId: function(sourceFileId)
-    {
-        var result = new Map();
-        var breakpoints = this._provisionalBreakpoints.get(sourceFileId).valuesArray();
-        for (var i = 0; i < breakpoints.length; ++i)
-            result.set(breakpoints[i]._breakpointStorageId(), breakpoints[i]);
-        return result;
-    },
-
-    removeProvisionalBreakpointsForTest: function()
-    {
-        var breakpoints = this._provisionalBreakpoints.valuesArray();
-        for (var i = 0; i < breakpoints.length; ++i)
-            breakpoints[i].remove();
-        this._provisionalBreakpoints.clear();
-    },
-
-    /**
-     * @param {!WebInspector.UISourceCode} uiSourceCode
-     */
-    _restoreBreakpoints: function(uiSourceCode)
-    {
-        var sourceFileId = this._sourceFileId(uiSourceCode);
-        if (!sourceFileId)
-            return;
-
-        this._storage.mute();
-        var breakpointItems = this._storage.breakpointItems(this._sourceFileId(uiSourceCode));
-        var provisionalBreakpoints = this._provisionalBreakpointsForSourceFileId(sourceFileId);
-        for (var i = 0; i < breakpointItems.length; ++i) {
-            var breakpointItem = breakpointItems[i];
-            var itemStorageId = WebInspector.BreakpointManager._breakpointStorageId(breakpointItem.sourceFileId, breakpointItem.lineNumber, breakpointItem.columnNumber);
-            var provisionalBreakpoint = provisionalBreakpoints.get(itemStorageId);
-            if (provisionalBreakpoint) {
-                if (!this._breakpointsForPrimaryUISourceCode.get(uiSourceCode))
-                    this._breakpointsForPrimaryUISourceCode.set(uiSourceCode, []);
-                this._breakpointsForPrimaryUISourceCode.get(uiSourceCode).push(provisionalBreakpoint);
-                provisionalBreakpoint._updateBreakpoint();
-            } else {
-                this._innerSetBreakpoint(uiSourceCode, breakpointItem.lineNumber, breakpointItem.columnNumber, breakpointItem.condition, breakpointItem.enabled);
-            }
-        }
-        this._provisionalBreakpoints.removeAll(sourceFileId);
-        this._storage.unmute();
-    },
-
-    /**
-     * @param {!WebInspector.Event} event
-     */
-    _uiSourceCodeAdded: function(event)
-    {
-        var uiSourceCode = /** @type {!WebInspector.UISourceCode} */ (event.data);
-        this._restoreBreakpoints(uiSourceCode);
-        if (uiSourceCode.contentType().hasScripts())
-            uiSourceCode.addEventListener(WebInspector.UISourceCode.Events.SourceMappingChanged, this._uiSourceCodeMappingChanged, this);
-    },
-
-    /**
-     * @param {!WebInspector.Event} event
-     */
-    _uiSourceCodeRemoved: function(event)
-    {
-        var uiSourceCode = /** @type {!WebInspector.UISourceCode} */ (event.data);
-        this._removeUISourceCode(uiSourceCode);
-    },
-
-    /**
-     * @param {!WebInspector.Event} event
-     */
-    _uiSourceCodeMappingChanged: function(event)
-    {
-        var uiSourceCode = /** @type {!WebInspector.UISourceCode} */ (event.target);
-        var isIdentity = /** @type {boolean} */ (event.data.isIdentity);
-        var target = /** @type {!WebInspector.Target} */ (event.data.target);
-        if (isIdentity)
-            return;
-        var breakpoints = this._breakpointsForPrimaryUISourceCode.get(uiSourceCode) || [];
-        for (var i = 0; i < breakpoints.length; ++i)
-            breakpoints[i]._updateInDebuggerForTarget(target);
-    },
-
-    /**
-     * @param {!WebInspector.UISourceCode} uiSourceCode
-     */
-    _removeUISourceCode: function(uiSourceCode)
-    {
-        var breakpoints = this._breakpointsForPrimaryUISourceCode.get(uiSourceCode) || [];
-        var sourceFileId = this._sourceFileId(uiSourceCode);
-        for (var i = 0; i < breakpoints.length; ++i) {
-            breakpoints[i]._resetLocations();
-            if (breakpoints[i].enabled())
-                this._provisionalBreakpoints.set(sourceFileId, breakpoints[i]);
-        }
-        uiSourceCode.removeEventListener(WebInspector.UISourceCode.Events.SourceMappingChanged, this._uiSourceCodeMappingChanged, this);
-        this._breakpointsForPrimaryUISourceCode.remove(uiSourceCode);
-    },
-
-    /**
-     * @param {!WebInspector.UISourceCode} uiSourceCode
-     * @param {number} lineNumber
-     * @param {number} columnNumber
-     * @param {string} condition
-     * @param {boolean} enabled
-     * @return {!WebInspector.BreakpointManager.Breakpoint}
-     */
-    setBreakpoint: function(uiSourceCode, lineNumber, columnNumber, condition, enabled)
-    {
-        var uiLocation = new WebInspector.UILocation(uiSourceCode, lineNumber, columnNumber);
-        var normalizedLocation = this._debuggerWorkspaceBinding.normalizeUILocation(uiLocation);
-        if (normalizedLocation.id() !== uiLocation.id()) {
-            WebInspector.Revealer.reveal(normalizedLocation);
-            uiLocation = normalizedLocation;
-        }
-        this.setBreakpointsActive(true);
-        return this._innerSetBreakpoint(uiLocation.uiSourceCode, uiLocation.lineNumber, uiLocation.columnNumber, condition, enabled);
-    },
-
-    /**
-     * @param {!WebInspector.UISourceCode} uiSourceCode
-     * @param {number} lineNumber
-     * @param {number} columnNumber
-     * @param {string} condition
-     * @param {boolean} enabled
-     * @return {!WebInspector.BreakpointManager.Breakpoint}
-     */
-    _innerSetBreakpoint: function(uiSourceCode, lineNumber, columnNumber, condition, enabled)
-    {
-        var breakpoint = this.findBreakpoint(uiSourceCode, lineNumber, columnNumber);
-        if (breakpoint) {
-            breakpoint._updateState(condition, enabled);
-            return breakpoint;
-        }
-        var projectId = uiSourceCode.project().id();
-        var path = uiSourceCode.url();
-        var sourceFileId = this._sourceFileId(uiSourceCode);
-        breakpoint = new WebInspector.BreakpointManager.Breakpoint(this, projectId, path, sourceFileId, lineNumber, columnNumber, condition, enabled);
-        if (!this._breakpointsForPrimaryUISourceCode.get(uiSourceCode))
-            this._breakpointsForPrimaryUISourceCode.set(uiSourceCode, []);
-        this._breakpointsForPrimaryUISourceCode.get(uiSourceCode).push(breakpoint);
-        return breakpoint;
-    },
-
-    /**
-     * @param {!WebInspector.UISourceCode} uiSourceCode
-     * @param {number} lineNumber
-     * @param {number} columnNumber
-     * @return {?WebInspector.BreakpointManager.Breakpoint}
-     */
-    findBreakpoint: function(uiSourceCode, lineNumber, columnNumber)
-    {
-        var breakpoints = this._breakpointsForUISourceCode.get(uiSourceCode);
-        var lineBreakpoints = breakpoints ? breakpoints.get(String(lineNumber)) : null;
-        var columnBreakpoints = lineBreakpoints ? lineBreakpoints.get(String(columnNumber)) : null;
-        return columnBreakpoints ? columnBreakpoints[0] : null;
-    },
-
-    /**
-     * @param {!WebInspector.UISourceCode} uiSourceCode
-     * @param {number} lineNumber
-     * @return {?WebInspector.BreakpointManager.Breakpoint}
-     */
-    findBreakpointOnLine: function(uiSourceCode, lineNumber)
-    {
-        var breakpoints = this._breakpointsForUISourceCode.get(uiSourceCode);
-        var lineBreakpoints = breakpoints ? breakpoints.get(String(lineNumber)) : null;
-        return lineBreakpoints ? lineBreakpoints.valuesArray()[0][0] : null;
-    },
-
-    /**
-     * @param {!WebInspector.UISourceCode} uiSourceCode
-     * @return {!Array.<!WebInspector.BreakpointManager.Breakpoint>}
-     */
-    breakpointsForUISourceCode: function(uiSourceCode)
-    {
-        var result = [];
-        var uiSourceCodeBreakpoints = this._breakpointsForUISourceCode.get(uiSourceCode);
-        var breakpoints = uiSourceCodeBreakpoints ? uiSourceCodeBreakpoints.valuesArray() : [];
-        for (var i = 0; i < breakpoints.length; ++i) {
-            var lineBreakpoints = breakpoints[i];
-            var columnBreakpointArrays = lineBreakpoints ? lineBreakpoints.valuesArray() : [];
-            result = result.concat.apply(result, columnBreakpointArrays);
-        }
-        return result;
-    },
-
-    /**
-     * @return {!Array.<!WebInspector.BreakpointManager.Breakpoint>}
-     */
-    allBreakpoints: function()
-    {
-        var result = [];
-        var uiSourceCodes = this._breakpointsForUISourceCode.keysArray();
-        for (var i = 0; i < uiSourceCodes.length; ++i)
-            result = result.concat(this.breakpointsForUISourceCode(uiSourceCodes[i]));
-        return result;
-    },
-
-    /**
-     * @param {!WebInspector.UISourceCode} uiSourceCode
-     * @return {!Array.<!{breakpoint: !WebInspector.BreakpointManager.Breakpoint, uiLocation: !WebInspector.UILocation}>}
-     */
-    breakpointLocationsForUISourceCode: function(uiSourceCode)
-    {
-        var uiSourceCodeBreakpoints = this._breakpointsForUISourceCode.get(uiSourceCode);
-        var lineNumbers = uiSourceCodeBreakpoints ? uiSourceCodeBreakpoints.keysArray() : [];
-        var result = [];
-        for (var i = 0; i < lineNumbers.length; ++i) {
-            var lineBreakpoints = uiSourceCodeBreakpoints.get(lineNumbers[i]);
-            var columnNumbers = lineBreakpoints.keysArray();
-            for (var j = 0; j < columnNumbers.length; ++j) {
-                var columnBreakpoints = lineBreakpoints.get(columnNumbers[j]);
-                var lineNumber = parseInt(lineNumbers[i], 10);
-                var columnNumber = parseInt(columnNumbers[j], 10);
-                for (var k = 0; k < columnBreakpoints.length; ++k) {
-                    var breakpoint = columnBreakpoints[k];
-                    var uiLocation = uiSourceCode.uiLocation(lineNumber, columnNumber);
-                    result.push({breakpoint: breakpoint, uiLocation: uiLocation});
-                }
-            }
-        }
-        return result;
-    },
-
-    /**
-     * @return {!Array.<!{breakpoint: !WebInspector.BreakpointManager.Breakpoint, uiLocation: !WebInspector.UILocation}>}
-     */
-    allBreakpointLocations: function()
-    {
-        var result = [];
-        var uiSourceCodes = this._breakpointsForUISourceCode.keysArray();
-        for (var i = 0; i < uiSourceCodes.length; ++i)
-            result = result.concat(this.breakpointLocationsForUISourceCode(uiSourceCodes[i]));
-        return result;
-    },
-
-    /**
-     * @param {boolean} toggleState
-     */
-    toggleAllBreakpoints: function(toggleState)
-    {
-        var breakpoints = this.allBreakpoints();
-        for (var i = 0; i < breakpoints.length; ++i)
-            breakpoints[i].setEnabled(toggleState);
-    },
-
-    removeAllBreakpoints: function()
-    {
-        var breakpoints = this.allBreakpoints();
-        for (var i = 0; i < breakpoints.length; ++i)
-            breakpoints[i].remove();
-    },
-
-    _projectRemoved: function(event)
-    {
-        var project = /** @type {!WebInspector.Project} */ (event.data);
-        var uiSourceCodes = project.uiSourceCodes();
-        for (var i = 0; i < uiSourceCodes.length; ++i)
-            this._removeUISourceCode(uiSourceCodes[i]);
-    },
-
-    /**
-     * @param {!WebInspector.BreakpointManager.Breakpoint} breakpoint
-     * @param {boolean} removeFromStorage
-     */
-    _removeBreakpoint: function(breakpoint, removeFromStorage)
-    {
-        var uiSourceCode = breakpoint.uiSourceCode();
-        var breakpoints = uiSourceCode ? this._breakpointsForPrimaryUISourceCode.get(uiSourceCode) || [] : [];
-        breakpoints.remove(breakpoint);
-        if (removeFromStorage)
-            this._storage._removeBreakpoint(breakpoint);
-        this._provisionalBreakpoints.remove(breakpoint._sourceFileId, breakpoint);
-    },
-
-    /**
-     * @param {!WebInspector.BreakpointManager.Breakpoint} breakpoint
-     * @param {!WebInspector.UILocation} uiLocation
-     */
-    _uiLocationAdded: function(breakpoint, uiLocation)
-    {
-        var breakpoints = this._breakpointsForUISourceCode.get(uiLocation.uiSourceCode);
-        if (!breakpoints) {
-            breakpoints = new Map();
-            this._breakpointsForUISourceCode.set(uiLocation.uiSourceCode, breakpoints);
-        }
-        var lineBreakpoints = breakpoints.get(String(uiLocation.lineNumber));
-        if (!lineBreakpoints) {
-            lineBreakpoints = new Map();
-            breakpoints.set(String(uiLocation.lineNumber), lineBreakpoints);
-        }
-        var columnBreakpoints = lineBreakpoints.get(String(uiLocation.columnNumber));
-        if (!columnBreakpoints) {
-            columnBreakpoints = [];
-            lineBreakpoints.set(String(uiLocation.columnNumber), columnBreakpoints);
-        }
-        columnBreakpoints.push(breakpoint);
-        this.dispatchEventToListeners(WebInspector.BreakpointManager.Events.BreakpointAdded, {breakpoint: breakpoint, uiLocation: uiLocation});
-    },
-
-    /**
-     * @param {!WebInspector.BreakpointManager.Breakpoint} breakpoint
-     * @param {!WebInspector.UILocation} uiLocation
-     */
-    _uiLocationRemoved: function(breakpoint, uiLocation)
-    {
-        var breakpoints = this._breakpointsForUISourceCode.get(uiLocation.uiSourceCode);
-        if (!breakpoints)
-            return;
-
-        var lineBreakpoints = breakpoints.get(String(uiLocation.lineNumber));
-        if (!lineBreakpoints)
-            return;
-        var columnBreakpoints = lineBreakpoints.get(String(uiLocation.columnNumber));
-        if (!columnBreakpoints)
-            return;
-        columnBreakpoints.remove(breakpoint);
-        if (!columnBreakpoints.length)
-            lineBreakpoints.remove(String(uiLocation.columnNumber));
-        if (!lineBreakpoints.size)
-            breakpoints.remove(String(uiLocation.lineNumber));
-        if (!breakpoints.size)
-            this._breakpointsForUISourceCode.remove(uiLocation.uiSourceCode);
-        this.dispatchEventToListeners(WebInspector.BreakpointManager.Events.BreakpointRemoved, {breakpoint: breakpoint, uiLocation: uiLocation});
-    },
-
-    /**
-     * @param {boolean} active
-     */
-    setBreakpointsActive: function(active)
-    {
-        if (this._breakpointsActive === active)
-            return;
-
-        this._breakpointsActive = active;
-        var debuggerModels = WebInspector.DebuggerModel.instances();
-        for (var i = 0; i < debuggerModels.length; ++i)
-            debuggerModels[i].setBreakpointsActive(active);
-
-        this.dispatchEventToListeners(WebInspector.BreakpointManager.Events.BreakpointsActiveStateChanged, active);
-    },
-
-    /**
-     * @return {boolean}
-     */
-    breakpointsActive: function()
-    {
-        return this._breakpointsActive;
-    },
-
-    __proto__: WebInspector.Object.prototype
-};
 
 /**
- * @constructor
  * @implements {WebInspector.TargetManager.Observer}
- * @param {!WebInspector.BreakpointManager} breakpointManager
- * @param {string} projectId
- * @param {string} path
- * @param {string} sourceFileId
- * @param {number} lineNumber
- * @param {number} columnNumber
- * @param {string} condition
- * @param {boolean} enabled
+ * @unrestricted
  */
-WebInspector.BreakpointManager.Breakpoint = function(breakpointManager, projectId, path, sourceFileId, lineNumber, columnNumber, condition, enabled)
-{
+WebInspector.BreakpointManager.Breakpoint = class {
+  /**
+   * @param {!WebInspector.BreakpointManager} breakpointManager
+   * @param {string} projectId
+   * @param {string} path
+   * @param {string} sourceFileId
+   * @param {number} lineNumber
+   * @param {number} columnNumber
+   * @param {string} condition
+   * @param {boolean} enabled
+   */
+  constructor(breakpointManager, projectId, path, sourceFileId, lineNumber, columnNumber, condition, enabled) {
     this._breakpointManager = breakpointManager;
     this._projectId = projectId;
     this._path = path;
@@ -494,244 +480,224 @@ WebInspector.BreakpointManager.Breakpoint = function(breakpointManager, projectI
     this._targetBreakpoints = new Map();
     this._updateState(condition, enabled);
     this._breakpointManager._targetManager.observeTargets(this);
-};
-
-WebInspector.BreakpointManager.Breakpoint.prototype = {
-    /**
-     * @override
-     * @param {!WebInspector.Target} target
-     */
-    targetAdded: function(target)
-    {
-        var debuggerModel = WebInspector.DebuggerModel.fromTarget(target);
-        if (!debuggerModel)
-            return;
-        var debuggerWorkspaceBinding = this._breakpointManager._debuggerWorkspaceBinding;
-        this._targetBreakpoints.set(target, new WebInspector.BreakpointManager.TargetBreakpoint(debuggerModel, this, debuggerWorkspaceBinding));
-    },
-
-    /**
-     * @override
-     * @param {!WebInspector.Target} target
-     */
-    targetRemoved: function(target)
-    {
-        var debuggerModel = WebInspector.DebuggerModel.fromTarget(target);
-        if (!debuggerModel)
-            return;
-        var targetBreakpoint = this._targetBreakpoints.remove(target);
-        targetBreakpoint._cleanUpAfterDebuggerIsGone();
-        targetBreakpoint._removeEventListeners();
-    },
-
-    /**
-     * @return {string}
-     */
-    projectId: function()
-    {
-        return this._projectId;
-    },
-
-    /**
-     * @return {string}
-     */
-    path: function()
-    {
-        return this._path;
-    },
-
-    /**
-     * @return {number}
-     */
-    lineNumber: function()
-    {
-        return this._lineNumber;
-    },
-
-    /**
-     * @return {number}
-     */
-    columnNumber: function()
-    {
-        return this._columnNumber;
-    },
-
-    /**
-     * @return {?WebInspector.UISourceCode}
-     */
-    uiSourceCode: function()
-    {
-        return this._breakpointManager._workspace.uiSourceCode(this._projectId, this._path);
-    },
-
-    /**
-     * @param {?WebInspector.UILocation} oldUILocation
-     * @param {!WebInspector.UILocation} newUILocation
-     */
-    _replaceUILocation: function(oldUILocation, newUILocation)
-    {
-        if (this._isRemoved)
-            return;
-
-        this._removeUILocation(oldUILocation, true);
-        this._removeFakeBreakpointAtPrimaryLocation();
-
-        var current = (this._numberOfDebuggerLocationForUILocation.get(newUILocation.id()) || 0) + 1;
-        this._numberOfDebuggerLocationForUILocation.set(newUILocation.id(), current);
-        if (current === 1)
-            this._breakpointManager._uiLocationAdded(this, newUILocation);
-    },
-
-    /**
-     * @param {?WebInspector.UILocation} uiLocation
-     * @param {boolean=} muteCreationFakeBreakpoint
-     */
-    _removeUILocation: function(uiLocation, muteCreationFakeBreakpoint)
-    {
-        if (!uiLocation || !this._numberOfDebuggerLocationForUILocation.has(uiLocation.id()))
-            return;
-        var current = (this._numberOfDebuggerLocationForUILocation.get(uiLocation.id()) || 0) - 1;
-        this._numberOfDebuggerLocationForUILocation.set(uiLocation.id(), current);
-        if (current !== 0)
-            return;
-
-        this._numberOfDebuggerLocationForUILocation.delete(uiLocation.id());
-        this._breakpointManager._uiLocationRemoved(this, uiLocation);
-        if (!muteCreationFakeBreakpoint)
-            this._fakeBreakpointAtPrimaryLocation();
-    },
-
-    /**
-     * @return {boolean}
-     */
-    enabled: function()
-    {
-        return this._enabled;
-    },
-
-    /**
-     * @param {boolean} enabled
-     */
-    setEnabled: function(enabled)
-    {
-        this._updateState(this._condition, enabled);
-    },
-
-    /**
-     * @return {string}
-     */
-    condition: function()
-    {
-        return this._condition;
-    },
-
-    /**
-     * @param {string} condition
-     */
-    setCondition: function(condition)
-    {
-        this._updateState(condition, this._enabled);
-    },
-
-    /**
-     * @param {string} condition
-     * @param {boolean} enabled
-     */
-    _updateState: function(condition, enabled)
-    {
-        if (this._enabled === enabled && this._condition === condition)
-            return;
-        this._enabled = enabled;
-        this._condition = condition;
-        this._breakpointManager._storage._updateBreakpoint(this);
-        this._updateBreakpoint();
-    },
-
-    _updateBreakpoint: function()
-    {
-        this._removeFakeBreakpointAtPrimaryLocation();
-        this._fakeBreakpointAtPrimaryLocation();
-        var targetBreakpoints = this._targetBreakpoints.valuesArray();
-        for (var i = 0; i < targetBreakpoints.length; ++i)
-            targetBreakpoints[i]._scheduleUpdateInDebugger();
-    },
-
-    /**
-     * @param {boolean=} keepInStorage
-     */
-    remove: function(keepInStorage)
-    {
-
-        this._isRemoved = true;
-        var removeFromStorage = !keepInStorage;
-        this._removeFakeBreakpointAtPrimaryLocation();
-        var targetBreakpoints = this._targetBreakpoints.valuesArray();
-        for (var i = 0; i < targetBreakpoints.length; ++i) {
-            targetBreakpoints[i]._scheduleUpdateInDebugger();
-            targetBreakpoints[i]._removeEventListeners();
-        }
+  }
+
+  /**
+   * @override
+   * @param {!WebInspector.Target} target
+   */
+  targetAdded(target) {
+    var debuggerModel = WebInspector.DebuggerModel.fromTarget(target);
+    if (!debuggerModel)
+      return;
+    var debuggerWorkspaceBinding = this._breakpointManager._debuggerWorkspaceBinding;
+    this._targetBreakpoints.set(
+        target, new WebInspector.BreakpointManager.TargetBreakpoint(debuggerModel, this, debuggerWorkspaceBinding));
+  }
+
+  /**
+   * @override
+   * @param {!WebInspector.Target} target
+   */
+  targetRemoved(target) {
+    var debuggerModel = WebInspector.DebuggerModel.fromTarget(target);
+    if (!debuggerModel)
+      return;
+    var targetBreakpoint = this._targetBreakpoints.remove(target);
+    targetBreakpoint._cleanUpAfterDebuggerIsGone();
+    targetBreakpoint._removeEventListeners();
+  }
+
+  /**
+   * @return {string}
+   */
+  projectId() {
+    return this._projectId;
+  }
+
+  /**
+   * @return {string}
+   */
+  path() {
+    return this._path;
+  }
+
+  /**
+   * @return {number}
+   */
+  lineNumber() {
+    return this._lineNumber;
+  }
+
+  /**
+   * @return {number}
+   */
+  columnNumber() {
+    return this._columnNumber;
+  }
+
+  /**
+   * @return {?WebInspector.UISourceCode}
+   */
+  uiSourceCode() {
+    return this._breakpointManager._workspace.uiSourceCode(this._projectId, this._path);
+  }
+
+  /**
+   * @param {?WebInspector.UILocation} oldUILocation
+   * @param {!WebInspector.UILocation} newUILocation
+   */
+  _replaceUILocation(oldUILocation, newUILocation) {
+    if (this._isRemoved)
+      return;
+
+    this._removeUILocation(oldUILocation, true);
+    this._removeFakeBreakpointAtPrimaryLocation();
+
+    var current = (this._numberOfDebuggerLocationForUILocation.get(newUILocation.id()) || 0) + 1;
+    this._numberOfDebuggerLocationForUILocation.set(newUILocation.id(), current);
+    if (current === 1)
+      this._breakpointManager._uiLocationAdded(this, newUILocation);
+  }
+
+  /**
+   * @param {?WebInspector.UILocation} uiLocation
+   * @param {boolean=} muteCreationFakeBreakpoint
+   */
+  _removeUILocation(uiLocation, muteCreationFakeBreakpoint) {
+    if (!uiLocation || !this._numberOfDebuggerLocationForUILocation.has(uiLocation.id()))
+      return;
+    var current = (this._numberOfDebuggerLocationForUILocation.get(uiLocation.id()) || 0) - 1;
+    this._numberOfDebuggerLocationForUILocation.set(uiLocation.id(), current);
+    if (current !== 0)
+      return;
+
+    this._numberOfDebuggerLocationForUILocation.delete(uiLocation.id());
+    this._breakpointManager._uiLocationRemoved(this, uiLocation);
+    if (!muteCreationFakeBreakpoint)
+      this._fakeBreakpointAtPrimaryLocation();
+  }
+
+  /**
+   * @return {boolean}
+   */
+  enabled() {
+    return this._enabled;
+  }
+
+  /**
+   * @param {boolean} enabled
+   */
+  setEnabled(enabled) {
+    this._updateState(this._condition, enabled);
+  }
+
+  /**
+   * @return {string}
+   */
+  condition() {
+    return this._condition;
+  }
+
+  /**
+   * @param {string} condition
+   */
+  setCondition(condition) {
+    this._updateState(condition, this._enabled);
+  }
+
+  /**
+   * @param {string} condition
+   * @param {boolean} enabled
+   */
+  _updateState(condition, enabled) {
+    if (this._enabled === enabled && this._condition === condition)
+      return;
+    this._enabled = enabled;
+    this._condition = condition;
+    this._breakpointManager._storage._updateBreakpoint(this);
+    this._updateBreakpoint();
+  }
+
+  _updateBreakpoint() {
+    this._removeFakeBreakpointAtPrimaryLocation();
+    this._fakeBreakpointAtPrimaryLocation();
+    var targetBreakpoints = this._targetBreakpoints.valuesArray();
+    for (var i = 0; i < targetBreakpoints.length; ++i)
+      targetBreakpoints[i]._scheduleUpdateInDebugger();
+  }
+
+  /**
+   * @param {boolean=} keepInStorage
+   */
+  remove(keepInStorage) {
+    this._isRemoved = true;
+    var removeFromStorage = !keepInStorage;
+    this._removeFakeBreakpointAtPrimaryLocation();
+    var targetBreakpoints = this._targetBreakpoints.valuesArray();
+    for (var i = 0; i < targetBreakpoints.length; ++i) {
+      targetBreakpoints[i]._scheduleUpdateInDebugger();
+      targetBreakpoints[i]._removeEventListeners();
+    }
 
-        this._breakpointManager._removeBreakpoint(this, removeFromStorage);
-        this._breakpointManager._targetManager.unobserveTargets(this);
-    },
-
-    /**
-     * @param {!WebInspector.Target} target
-     */
-    _updateInDebuggerForTarget: function(target)
-    {
-        this._targetBreakpoints.get(target)._scheduleUpdateInDebugger();
-    },
-
-    /**
-     * @return {string}
-     */
-    _breakpointStorageId: function()
-    {
-        return WebInspector.BreakpointManager._breakpointStorageId(this._sourceFileId, this._lineNumber, this._columnNumber);
-    },
-
-    _fakeBreakpointAtPrimaryLocation: function()
-    {
-        if (this._isRemoved || this._numberOfDebuggerLocationForUILocation.size || this._fakePrimaryLocation)
-            return;
-
-        var uiSourceCode = this._breakpointManager._workspace.uiSourceCode(this._projectId, this._path);
-        if (!uiSourceCode)
-            return;
-
-        this._fakePrimaryLocation = uiSourceCode.uiLocation(this._lineNumber, this._columnNumber);
-        if (this._fakePrimaryLocation)
-            this._breakpointManager._uiLocationAdded(this, this._fakePrimaryLocation);
-    },
-
-    _removeFakeBreakpointAtPrimaryLocation: function()
-    {
-        if (this._fakePrimaryLocation) {
-            this._breakpointManager._uiLocationRemoved(this, this._fakePrimaryLocation);
-            delete this._fakePrimaryLocation;
-        }
-    },
-
-    _resetLocations: function()
-    {
-        this._removeFakeBreakpointAtPrimaryLocation();
-        var targetBreakpoints = this._targetBreakpoints.valuesArray();
-        for (var i = 0; i < targetBreakpoints.length; ++i)
-            targetBreakpoints[i]._resetLocations();
+    this._breakpointManager._removeBreakpoint(this, removeFromStorage);
+    this._breakpointManager._targetManager.unobserveTargets(this);
+  }
+
+  /**
+   * @param {!WebInspector.Target} target
+   */
+  _updateInDebuggerForTarget(target) {
+    this._targetBreakpoints.get(target)._scheduleUpdateInDebugger();
+  }
+
+  /**
+   * @return {string}
+   */
+  _breakpointStorageId() {
+    return WebInspector.BreakpointManager._breakpointStorageId(
+        this._sourceFileId, this._lineNumber, this._columnNumber);
+  }
+
+  _fakeBreakpointAtPrimaryLocation() {
+    if (this._isRemoved || this._numberOfDebuggerLocationForUILocation.size || this._fakePrimaryLocation)
+      return;
+
+    var uiSourceCode = this._breakpointManager._workspace.uiSourceCode(this._projectId, this._path);
+    if (!uiSourceCode)
+      return;
+
+    this._fakePrimaryLocation = uiSourceCode.uiLocation(this._lineNumber, this._columnNumber);
+    if (this._fakePrimaryLocation)
+      this._breakpointManager._uiLocationAdded(this, this._fakePrimaryLocation);
+  }
+
+  _removeFakeBreakpointAtPrimaryLocation() {
+    if (this._fakePrimaryLocation) {
+      this._breakpointManager._uiLocationRemoved(this, this._fakePrimaryLocation);
+      delete this._fakePrimaryLocation;
     }
+  }
+
+  _resetLocations() {
+    this._removeFakeBreakpointAtPrimaryLocation();
+    var targetBreakpoints = this._targetBreakpoints.valuesArray();
+    for (var i = 0; i < targetBreakpoints.length; ++i)
+      targetBreakpoints[i]._resetLocations();
+  }
 };
 
 /**
- * @constructor
- * @extends {WebInspector.SDKObject}
- * @param {!WebInspector.DebuggerModel} debuggerModel
- * @param {!WebInspector.BreakpointManager.Breakpoint} breakpoint
- * @param {!WebInspector.DebuggerWorkspaceBinding} debuggerWorkspaceBinding
+ * @unrestricted
  */
-WebInspector.BreakpointManager.TargetBreakpoint = function(debuggerModel, breakpoint, debuggerWorkspaceBinding)
-{
-    WebInspector.SDKObject.call(this, debuggerModel.target());
+WebInspector.BreakpointManager.TargetBreakpoint = class extends WebInspector.SDKObject {
+  /**
+   * @param {!WebInspector.DebuggerModel} debuggerModel
+   * @param {!WebInspector.BreakpointManager.Breakpoint} breakpoint
+   * @param {!WebInspector.DebuggerWorkspaceBinding} debuggerWorkspaceBinding
+   */
+  constructor(debuggerModel, breakpoint, debuggerWorkspaceBinding) {
+    super(debuggerModel.target());
     this._debuggerModel = debuggerModel;
     this._breakpoint = breakpoint;
     this._debuggerWorkspaceBinding = debuggerWorkspaceBinding;
@@ -740,344 +706,345 @@ WebInspector.BreakpointManager.TargetBreakpoint = function(debuggerModel, breakp
 
     /** @type {!Map<string, !WebInspector.UILocation>} */
     this._uiLocations = new Map();
-    this._debuggerModel.addEventListener(WebInspector.DebuggerModel.Events.DebuggerWasDisabled, this._cleanUpAfterDebuggerIsGone, this);
-    this._debuggerModel.addEventListener(WebInspector.DebuggerModel.Events.DebuggerWasEnabled, this._scheduleUpdateInDebugger, this);
+    this._debuggerModel.addEventListener(
+        WebInspector.DebuggerModel.Events.DebuggerWasDisabled, this._cleanUpAfterDebuggerIsGone, this);
+    this._debuggerModel.addEventListener(
+        WebInspector.DebuggerModel.Events.DebuggerWasEnabled, this._scheduleUpdateInDebugger, this);
     this._hasPendingUpdate = false;
     this._isUpdating = false;
     this._cancelCallback = false;
     this._currentState = null;
     if (this._debuggerModel.debuggerEnabled())
-        this._scheduleUpdateInDebugger();
-};
+      this._scheduleUpdateInDebugger();
+  }
 
-WebInspector.BreakpointManager.TargetBreakpoint.prototype = {
+  _resetLocations() {
+    for (var uiLocation of this._uiLocations.values())
+      this._breakpoint._removeUILocation(uiLocation);
 
-    _resetLocations: function()
-    {
-        for (var uiLocation of this._uiLocations.values())
-            this._breakpoint._removeUILocation(uiLocation);
+    this._uiLocations.clear();
+    this._liveLocations.disposeAll();
+  }
 
-        this._uiLocations.clear();
-        this._liveLocations.disposeAll();
-    },
+  _scheduleUpdateInDebugger() {
+    if (this._isUpdating) {
+      this._hasPendingUpdate = true;
+      return;
+    }
 
-    _scheduleUpdateInDebugger: function()
-    {
-        if (this._isUpdating) {
-            this._hasPendingUpdate = true;
-            return;
-        }
+    this._isUpdating = true;
+    this._updateInDebugger(this._didUpdateInDebugger.bind(this));
+  }
 
-        this._isUpdating = true;
-        this._updateInDebugger(this._didUpdateInDebugger.bind(this));
-    },
+  _didUpdateInDebugger() {
+    this._isUpdating = false;
+    if (this._hasPendingUpdate) {
+      this._hasPendingUpdate = false;
+      this._scheduleUpdateInDebugger();
+    }
+  }
+
+  /**
+   * @return {boolean}
+   */
+  _scriptDiverged() {
+    var uiSourceCode = this._breakpoint.uiSourceCode();
+    if (!uiSourceCode)
+      return false;
+    var scriptFile = this._debuggerWorkspaceBinding.scriptFile(uiSourceCode, this.target());
+    return !!scriptFile && scriptFile.hasDivergedFromVM();
+  }
+
+  /**
+   * @param {function()} callback
+   */
+  _updateInDebugger(callback) {
+    if (this.target().isDisposed()) {
+      this._cleanUpAfterDebuggerIsGone();
+      callback();
+      return;
+    }
 
-    _didUpdateInDebugger: function()
-    {
-        this._isUpdating = false;
-        if (this._hasPendingUpdate) {
-            this._hasPendingUpdate = false;
-            this._scheduleUpdateInDebugger();
-        }
-    },
-
-    /**
-     * @return {boolean}
-     */
-    _scriptDiverged: function()
-    {
-        var uiSourceCode = this._breakpoint.uiSourceCode();
-        if (!uiSourceCode)
-            return false;
-        var scriptFile = this._debuggerWorkspaceBinding.scriptFile(uiSourceCode, this.target());
-        return !!scriptFile && scriptFile.hasDivergedFromVM();
-    },
-
-    /**
-     * @param {function()} callback
-     */
-    _updateInDebugger: function(callback)
-    {
-        if (this.target().isDisposed()) {
-            this._cleanUpAfterDebuggerIsGone();
-            callback();
-            return;
-        }
+    var uiSourceCode = this._breakpoint.uiSourceCode();
+    var lineNumber = this._breakpoint._lineNumber;
+    var columnNumber = this._breakpoint._columnNumber;
+    var condition = this._breakpoint.condition();
+
+    var debuggerLocation = uiSourceCode ?
+        this._debuggerWorkspaceBinding.uiLocationToRawLocation(this.target(), uiSourceCode, lineNumber, columnNumber) :
+        null;
+    var newState;
+    if (this._breakpoint._isRemoved || !this._breakpoint.enabled() || this._scriptDiverged())
+      newState = null;
+    else if (debuggerLocation) {
+      var script = debuggerLocation.script();
+      if (script.sourceURL)
+        newState = new WebInspector.BreakpointManager.Breakpoint.State(
+            script.sourceURL, null, debuggerLocation.lineNumber, debuggerLocation.columnNumber, condition);
+      else
+        newState = new WebInspector.BreakpointManager.Breakpoint.State(
+            null, debuggerLocation.scriptId, debuggerLocation.lineNumber, debuggerLocation.columnNumber, condition);
+    } else if (this._breakpoint._currentState && this._breakpoint._currentState.url) {
+      var position = this._breakpoint._currentState;
+      newState = new WebInspector.BreakpointManager.Breakpoint.State(
+          position.url, null, position.lineNumber, position.columnNumber, condition);
+    } else if (uiSourceCode) {
+      newState = new WebInspector.BreakpointManager.Breakpoint.State(
+          uiSourceCode.url(), null, lineNumber, columnNumber, condition);
+    }
+    if (this._debuggerId && WebInspector.BreakpointManager.Breakpoint.State.equals(newState, this._currentState)) {
+      callback();
+      return;
+    }
 
-        var uiSourceCode = this._breakpoint.uiSourceCode();
-        var lineNumber = this._breakpoint._lineNumber;
-        var columnNumber = this._breakpoint._columnNumber;
-        var condition = this._breakpoint.condition();
-
-        var debuggerLocation = uiSourceCode ? this._debuggerWorkspaceBinding.uiLocationToRawLocation(this.target(), uiSourceCode, lineNumber, columnNumber) : null;
-        var newState;
-        if (this._breakpoint._isRemoved || !this._breakpoint.enabled() || this._scriptDiverged())
-            newState = null;
-        else if (debuggerLocation) {
-            var script = debuggerLocation.script();
-            if (script.sourceURL)
-                newState = new WebInspector.BreakpointManager.Breakpoint.State(script.sourceURL, null, debuggerLocation.lineNumber, debuggerLocation.columnNumber, condition);
-            else
-                newState = new WebInspector.BreakpointManager.Breakpoint.State(null, debuggerLocation.scriptId, debuggerLocation.lineNumber, debuggerLocation.columnNumber, condition);
-        } else if (this._breakpoint._currentState && this._breakpoint._currentState.url) {
-            var position = this._breakpoint._currentState;
-            newState = new WebInspector.BreakpointManager.Breakpoint.State(position.url, null, position.lineNumber, position.columnNumber, condition);
-        } else if (uiSourceCode) {
-            newState = new WebInspector.BreakpointManager.Breakpoint.State(uiSourceCode.url(), null, lineNumber, columnNumber, condition);
-        }
-        if (this._debuggerId && WebInspector.BreakpointManager.Breakpoint.State.equals(newState, this._currentState)) {
-            callback();
-            return;
-        }
+    this._breakpoint._currentState = newState;
 
-        this._breakpoint._currentState = newState;
+    if (this._debuggerId) {
+      this._resetLocations();
+      this._debuggerModel.removeBreakpoint(this._debuggerId, this._didRemoveFromDebugger.bind(this, callback));
+      this._scheduleUpdateInDebugger();
+      this._currentState = null;
+      return;
+    }
 
-        if (this._debuggerId) {
-            this._resetLocations();
-            this._debuggerModel.removeBreakpoint(this._debuggerId, this._didRemoveFromDebugger.bind(this, callback));
-            this._scheduleUpdateInDebugger();
-            this._currentState = null;
-            return;
-        }
+    if (!newState) {
+      callback();
+      return;
+    }
 
-        if (!newState) {
-            callback();
-            return;
-        }
+    var updateCallback = this._didSetBreakpointInDebugger.bind(this, callback);
+    if (newState.url)
+      this._debuggerModel.setBreakpointByURL(
+          newState.url, newState.lineNumber, newState.columnNumber, this._breakpoint.condition(), updateCallback);
+    else if (newState.scriptId)
+      this._debuggerModel.setBreakpointBySourceId(
+          /** @type {!WebInspector.DebuggerModel.Location} */ (debuggerLocation), condition, updateCallback);
+
+    this._currentState = newState;
+  }
+
+  /**
+   * @param {function()} callback
+   * @param {?DebuggerAgent.BreakpointId} breakpointId
+   * @param {!Array.<!WebInspector.DebuggerModel.Location>} locations
+   */
+  _didSetBreakpointInDebugger(callback, breakpointId, locations) {
+    if (this._cancelCallback) {
+      this._cancelCallback = false;
+      callback();
+      return;
+    }
 
-        var updateCallback = this._didSetBreakpointInDebugger.bind(this, callback);
-        if (newState.url)
-            this._debuggerModel.setBreakpointByURL(newState.url, newState.lineNumber, newState.columnNumber, this._breakpoint.condition(), updateCallback);
-        else if (newState.scriptId)
-            this._debuggerModel.setBreakpointBySourceId(/** @type {!WebInspector.DebuggerModel.Location} */ (debuggerLocation), condition, updateCallback);
-
-        this._currentState = newState;
-    },
-
-    /**
-     * @param {function()} callback
-     * @param {?DebuggerAgent.BreakpointId} breakpointId
-     * @param {!Array.<!WebInspector.DebuggerModel.Location>} locations
-     */
-    _didSetBreakpointInDebugger: function(callback, breakpointId, locations)
-    {
-        if (this._cancelCallback) {
-            this._cancelCallback = false;
-            callback();
-            return;
-        }
+    if (!breakpointId) {
+      this._breakpoint.remove(true);
+      callback();
+      return;
+    }
 
-        if (!breakpointId) {
-            this._breakpoint.remove(true);
-            callback();
-            return;
-        }
+    this._debuggerId = breakpointId;
+    this._debuggerModel.addBreakpointListener(this._debuggerId, this._breakpointResolved, this);
+    for (var i = 0; i < locations.length; ++i) {
+      if (!this._addResolvedLocation(locations[i]))
+        break;
+    }
+    callback();
+  }
+
+  /**
+   * @param {function()} callback
+   */
+  _didRemoveFromDebugger(callback) {
+    if (this._cancelCallback) {
+      this._cancelCallback = false;
+      callback();
+      return;
+    }
 
-        this._debuggerId = breakpointId;
-        this._debuggerModel.addBreakpointListener(this._debuggerId, this._breakpointResolved, this);
-        for (var i = 0; i < locations.length; ++i) {
-            if (!this._addResolvedLocation(locations[i]))
-                break;
-        }
-        callback();
-    },
-
-    /**
-     * @param {function()} callback
-     */
-    _didRemoveFromDebugger: function(callback)
-    {
-        if (this._cancelCallback) {
-            this._cancelCallback = false;
-            callback();
-            return;
-        }
+    this._resetLocations();
+    this._debuggerModel.removeBreakpointListener(this._debuggerId, this._breakpointResolved, this);
+    delete this._debuggerId;
+    callback();
+  }
+
+  /**
+   * @param {!WebInspector.Event} event
+   */
+  _breakpointResolved(event) {
+    this._addResolvedLocation(/** @type {!WebInspector.DebuggerModel.Location}*/ (event.data));
+  }
+
+  /**
+   * @param {!WebInspector.DebuggerModel.Location} location
+   * @param {!WebInspector.LiveLocation} liveLocation
+   */
+  _locationUpdated(location, liveLocation) {
+    var uiLocation = liveLocation.uiLocation();
+    if (!uiLocation)
+      return;
+    var oldUILocation = this._uiLocations.get(location.id()) || null;
+    this._uiLocations.set(location.id(), uiLocation);
+    this._breakpoint._replaceUILocation(oldUILocation, uiLocation);
+  }
+
+  /**
+   * @param {!WebInspector.DebuggerModel.Location} location
+   * @return {boolean}
+   */
+  _addResolvedLocation(location) {
+    var uiLocation = this._debuggerWorkspaceBinding.rawLocationToUILocation(location);
+    var breakpoint = this._breakpoint._breakpointManager.findBreakpoint(
+        uiLocation.uiSourceCode, uiLocation.lineNumber, uiLocation.columnNumber);
+    if (breakpoint && breakpoint !== this._breakpoint) {
+      // location clash
+      this._breakpoint.remove();
+      return false;
+    }
+    this._debuggerWorkspaceBinding.createLiveLocation(
+        location, this._locationUpdated.bind(this, location), this._liveLocations);
+    return true;
+  }
 
-        this._resetLocations();
-        this._debuggerModel.removeBreakpointListener(this._debuggerId, this._breakpointResolved, this);
-        delete this._debuggerId;
-        callback();
-    },
-
-    /**
-     * @param {!WebInspector.Event} event
-     */
-    _breakpointResolved: function(event)
-    {
-        this._addResolvedLocation(/** @type {!WebInspector.DebuggerModel.Location}*/ (event.data));
-    },
-
-    /**
-     * @param {!WebInspector.DebuggerModel.Location} location
-     * @param {!WebInspector.LiveLocation} liveLocation
-     */
-    _locationUpdated: function(location, liveLocation)
-    {
-        var uiLocation = liveLocation.uiLocation();
-        if (!uiLocation)
-            return;
-        var oldUILocation = this._uiLocations.get(location.id()) || null;
-        this._uiLocations.set(location.id(), uiLocation);
-        this._breakpoint._replaceUILocation(oldUILocation, uiLocation);
-    },
-
-    /**
-     * @param {!WebInspector.DebuggerModel.Location} location
-     * @return {boolean}
-     */
-    _addResolvedLocation: function(location)
-    {
-        var uiLocation = this._debuggerWorkspaceBinding.rawLocationToUILocation(location);
-        var breakpoint = this._breakpoint._breakpointManager.findBreakpoint(uiLocation.uiSourceCode, uiLocation.lineNumber, uiLocation.columnNumber);
-        if (breakpoint && breakpoint !== this._breakpoint) {
-            // location clash
-            this._breakpoint.remove();
-            return false;
-        }
-        this._debuggerWorkspaceBinding.createLiveLocation(location, this._locationUpdated.bind(this, location), this._liveLocations);
-        return true;
-    },
-
-    _cleanUpAfterDebuggerIsGone: function()
-    {
-        if (this._isUpdating)
-            this._cancelCallback = true;
-
-        this._resetLocations();
-        this._currentState = null;
-        if (this._debuggerId)
-            this._didRemoveFromDebugger(function() {});
-    },
-
-    _removeEventListeners: function()
-    {
-        this._debuggerModel.removeEventListener(WebInspector.DebuggerModel.Events.DebuggerWasDisabled, this._cleanUpAfterDebuggerIsGone, this);
-        this._debuggerModel.removeEventListener(WebInspector.DebuggerModel.Events.DebuggerWasEnabled, this._scheduleUpdateInDebugger, this);
-    },
-
-    __proto__: WebInspector.SDKObject.prototype
+  _cleanUpAfterDebuggerIsGone() {
+    if (this._isUpdating)
+      this._cancelCallback = true;
+
+    this._resetLocations();
+    this._currentState = null;
+    if (this._debuggerId)
+      this._didRemoveFromDebugger(function() {});
+  }
+
+  _removeEventListeners() {
+    this._debuggerModel.removeEventListener(
+        WebInspector.DebuggerModel.Events.DebuggerWasDisabled, this._cleanUpAfterDebuggerIsGone, this);
+    this._debuggerModel.removeEventListener(
+        WebInspector.DebuggerModel.Events.DebuggerWasEnabled, this._scheduleUpdateInDebugger, this);
+  }
 };
 
 /**
- * @constructor
- * @param {?string} url
- * @param {?string} scriptId
- * @param {number} lineNumber
- * @param {number} columnNumber
- * @param {string} condition
+ * @unrestricted
  */
-WebInspector.BreakpointManager.Breakpoint.State = function(url, scriptId, lineNumber, columnNumber, condition)
-{
+WebInspector.BreakpointManager.Breakpoint.State = class {
+  /**
+   * @param {?string} url
+   * @param {?string} scriptId
+   * @param {number} lineNumber
+   * @param {number} columnNumber
+   * @param {string} condition
+   */
+  constructor(url, scriptId, lineNumber, columnNumber, condition) {
     this.url = url;
     this.scriptId = scriptId;
     this.lineNumber = lineNumber;
     this.columnNumber = columnNumber;
     this.condition = condition;
-};
-
-/**
- * @param {?WebInspector.BreakpointManager.Breakpoint.State|undefined} stateA
- * @param {?WebInspector.BreakpointManager.Breakpoint.State|undefined} stateB
- * @return {boolean}
- */
-WebInspector.BreakpointManager.Breakpoint.State.equals = function(stateA, stateB)
-{
+  }
+
+  /**
+   * @param {?WebInspector.BreakpointManager.Breakpoint.State|undefined} stateA
+   * @param {?WebInspector.BreakpointManager.Breakpoint.State|undefined} stateB
+   * @return {boolean}
+   */
+  static equals(stateA, stateB) {
     if (!stateA || !stateB)
-        return false;
+      return false;
 
     if (stateA.scriptId || stateB.scriptId)
-        return false;
+      return false;
 
-    return stateA.url === stateB.url && stateA.lineNumber === stateB.lineNumber && stateA.columnNumber === stateB.columnNumber && stateA.condition === stateB.condition;
+    return stateA.url === stateB.url && stateA.lineNumber === stateB.lineNumber &&
+        stateA.columnNumber === stateB.columnNumber && stateA.condition === stateB.condition;
+  }
 };
 
+
 /**
- * @constructor
- * @param {!WebInspector.BreakpointManager} breakpointManager
- * @param {?WebInspector.Setting} setting
+ * @unrestricted
  */
-WebInspector.BreakpointManager.Storage = function(breakpointManager, setting)
-{
+WebInspector.BreakpointManager.Storage = class {
+  /**
+   * @param {!WebInspector.BreakpointManager} breakpointManager
+   * @param {?WebInspector.Setting} setting
+   */
+  constructor(breakpointManager, setting) {
     this._breakpointManager = breakpointManager;
-    this._setting = setting || WebInspector.settings.createLocalSetting("breakpoints", []);
+    this._setting = setting || WebInspector.settings.createLocalSetting('breakpoints', []);
     var breakpoints = this._setting.get();
     /** @type {!Object.<string, !WebInspector.BreakpointManager.Storage.Item>} */
     this._breakpoints = {};
     for (var i = 0; i < breakpoints.length; ++i) {
-        var breakpoint = /** @type {!WebInspector.BreakpointManager.Storage.Item} */ (breakpoints[i]);
-        breakpoint.columnNumber = breakpoint.columnNumber || 0;
-        this._breakpoints[breakpoint.sourceFileId + ":" + breakpoint.lineNumber + ":" + breakpoint.columnNumber] = breakpoint;
+      var breakpoint = /** @type {!WebInspector.BreakpointManager.Storage.Item} */ (breakpoints[i]);
+      breakpoint.columnNumber = breakpoint.columnNumber || 0;
+      this._breakpoints[breakpoint.sourceFileId + ':' + breakpoint.lineNumber + ':' + breakpoint.columnNumber] =
+          breakpoint;
     }
-};
-
-WebInspector.BreakpointManager.Storage.prototype = {
-    mute: function()
-    {
-        this._muted = true;
-    },
-
-    unmute: function()
-    {
-        delete this._muted;
-    },
-
-    /**
-     * @param {string} sourceFileId
-     * @return {!Array.<!WebInspector.BreakpointManager.Storage.Item>}
-     */
-    breakpointItems: function(sourceFileId)
-    {
-        var result = [];
-        for (var id in this._breakpoints) {
-            var breakpoint = this._breakpoints[id];
-            if (breakpoint.sourceFileId === sourceFileId)
-                result.push(breakpoint);
-        }
-        return result;
-    },
-
-    /**
-     * @param {!WebInspector.BreakpointManager.Breakpoint} breakpoint
-     */
-    _updateBreakpoint: function(breakpoint)
-    {
-        if (this._muted || !breakpoint._breakpointStorageId())
-            return;
-        this._breakpoints[breakpoint._breakpointStorageId()] = new WebInspector.BreakpointManager.Storage.Item(breakpoint);
-        this._save();
-    },
-
-    /**
-     * @param {!WebInspector.BreakpointManager.Breakpoint} breakpoint
-     */
-    _removeBreakpoint: function(breakpoint)
-    {
-        if (this._muted)
-            return;
-        delete this._breakpoints[breakpoint._breakpointStorageId()];
-        this._save();
-    },
-
-    _save: function()
-    {
-        var breakpointsArray = [];
-        for (var id in this._breakpoints)
-            breakpointsArray.push(this._breakpoints[id]);
-        this._setting.set(breakpointsArray);
+  }
+
+  mute() {
+    this._muted = true;
+  }
+
+  unmute() {
+    delete this._muted;
+  }
+
+  /**
+   * @param {string} sourceFileId
+   * @return {!Array.<!WebInspector.BreakpointManager.Storage.Item>}
+   */
+  breakpointItems(sourceFileId) {
+    var result = [];
+    for (var id in this._breakpoints) {
+      var breakpoint = this._breakpoints[id];
+      if (breakpoint.sourceFileId === sourceFileId)
+        result.push(breakpoint);
     }
+    return result;
+  }
+
+  /**
+   * @param {!WebInspector.BreakpointManager.Breakpoint} breakpoint
+   */
+  _updateBreakpoint(breakpoint) {
+    if (this._muted || !breakpoint._breakpointStorageId())
+      return;
+    this._breakpoints[breakpoint._breakpointStorageId()] = new WebInspector.BreakpointManager.Storage.Item(breakpoint);
+    this._save();
+  }
+
+  /**
+   * @param {!WebInspector.BreakpointManager.Breakpoint} breakpoint
+   */
+  _removeBreakpoint(breakpoint) {
+    if (this._muted)
+      return;
+    delete this._breakpoints[breakpoint._breakpointStorageId()];
+    this._save();
+  }
+
+  _save() {
+    var breakpointsArray = [];
+    for (var id in this._breakpoints)
+      breakpointsArray.push(this._breakpoints[id]);
+    this._setting.set(breakpointsArray);
+  }
 };
 
 /**
- * @constructor
- * @param {!WebInspector.BreakpointManager.Breakpoint} breakpoint
+ * @unrestricted
  */
-WebInspector.BreakpointManager.Storage.Item = function(breakpoint)
-{
+WebInspector.BreakpointManager.Storage.Item = class {
+  /**
+   * @param {!WebInspector.BreakpointManager.Breakpoint} breakpoint
+   */
+  constructor(breakpoint) {
     this.sourceFileId = breakpoint._sourceFileId;
     this.lineNumber = breakpoint.lineNumber();
     this.columnNumber = breakpoint.columnNumber();
     this.condition = breakpoint.condition();
     this.enabled = breakpoint.enabled();
+  }
 };
 
 /** @type {!WebInspector.BreakpointManager} */