Tests that breakpoints are successfully restored after debugger disabling.

Main resource was shown.
Debugger disabled.
Evaluating test function.
Error: Assertion failed: 
    at Object.console.assert (evaluateInWebInspector0.js:37:29)
    at Bindings.DebuggerWorkspaceBinding.rawLocationToUILocation (file:///b/c/b/linux/src/out/Release/resources/inspector/inspector.js:6293:97)
    at locations.map.location (file:///b/c/b/linux/src/out/Release/resources/inspector/inspector.js:6390:137)
    at Array.map (native)
    at Bindings.BreakpointManager.toUILocations (file:///b/c/b/linux/src/out/Release/resources/inspector/inspector.js:6390:92)
    at <anonymous>
FAIL: Uncaught exception in promise: TypeError: Cannot read property '_rawLocationToUILocation' of null
    at Bindings.DebuggerWorkspaceBinding.rawLocationToUILocation (file:///b/c/b/linux/src/out/Release/resources/inspector/inspector.js:6293:121)
    at locations.map.location (file:///b/c/b/linux/src/out/Release/resources/inspector/inspector.js:6390:137)
    at Array.map (native)
    at Bindings.BreakpointManager.toUILocations (file:///b/c/b/linux/src/out/Release/resources/inspector/inspector.js:6390:92)
    at <anonymous> Error
    at Promise.then (evaluateInWebInspector0.js:1097:77)
    at Bindings.BreakpointManager.possibleBreakpoints (file:///b/c/b/linux/src/out/Release/resources/inspector/inspector.js:6389:87)
    at Sources.JavaScriptSourceFrame._addBreakpoint (file:///b/c/b/linux/src/out/Release/resources/inspector/sources/sources_module.js:462:194)
    at Sources.JavaScriptSourceFrame._breakpointAdded (file:///b/c/b/linux/src/out/Release/resources/inspector/sources/sources_module.js:460:91)
    at Bindings.BreakpointManager.dispatchEventToListeners (file:///b/c/b/linux/src/out/Release/resources/inspector/inspector.js:477:23)
    at Bindings.BreakpointManager._uiLocationAdded (file:///b/c/b/linux/src/out/Release/resources/inspector/inspector.js:6415:41)
    at Bindings.BreakpointManager.Breakpoint._fakeBreakpointAtPrimaryLocation (file:///b/c/b/linux/src/out/Release/resources/inspector/inspector.js:6456:25)
    at Bindings.BreakpointManager.Breakpoint._updateBreakpoint (file:///b/c/b/linux/src/out/Release/resources/inspector/inspector.js:6447:72)
    at Bindings.BreakpointManager.Breakpoint._updateState (file:///b/c/b/linux/src/out/Release/resources/inspector/inspector.js:6446:118)
    at new Bindings.BreakpointManager.Breakpoint (file:///b/c/b/linux/src/out/Release/resources/inspector/inspector.js:6426:712)

