Revert of Timeline: bring back FirstPaint marker and remove brown ticks near frame markers

Revert of Timeline: bring back FirstPaint marker and remove brown ticks near frame markers (patchset #1 id:1 of https://codereview.chromium.org/732683002/)

Reason for revert:
This is wrong as it processes trace events from different trace threads and relied on their relative order. Let's do it right from scratch so that it's easier to merge.

Original issue's description:
> Timeline: bring back FirstPaint marker and remove brown ticks near frame markers
> 
> - implement synthetic FirstPaint markers on front-end (they used to be generated
>     on the back-end with old Timeline instrumentation which is an ex-parrot)
> - remove brown marks near the frame markers (regressed at r177959)
> 
> BUG=
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=185392

TBR=yurys@chromium.org,pfeldman@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=186039

[caseq, 2014-11-26 16:50:50]

Created Revert of Timeline: bring back FirstPaint marker and remove brown ticks
near frame markers

[commit-bot: I haz the power, 2014-11-26 16:51:51]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/761493004/1

[commit-bot: I haz the power, 2014-11-26 16:51:58]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-11-26 16:51:59]

Failed to apply patch for Source/devtools/front_end/timeline/TimelineModel.js:
While running patch -p1 --forward --force --no-backup-if-mismatch;
  patching file Source/devtools/front_end/timeline/TimelineModel.js
  Hunk #1 succeeded at 807 (offset 52 lines).
  Hunk #2 FAILED at 765.
  Hunk #3 succeeded at 852 (offset 64 lines).
  Hunk #4 succeeded at 863 (offset 49 lines).
  Hunk #5 succeeded at 1031 (offset 47 lines).
  1 out of 5 hunks FAILED -- saving rejects to file
Source/devtools/front_end/timeline/TimelineModel.js.rej

Patch:       Source/devtools/front_end/timeline/TimelineModel.js
Index: Source/devtools/front_end/timeline/TimelineModel.js
diff --git a/Source/devtools/front_end/timeline/TimelineModel.js
b/Source/devtools/front_end/timeline/TimelineModel.js
index
dc9c8b2105a37b6fddb61b33e38c80b66a8374ed..0a768dfee48b297b2e9f2f7b585eae4f5208c946
100644
--- a/Source/devtools/front_end/timeline/TimelineModel.js
+++ b/Source/devtools/front_end/timeline/TimelineModel.js
@@ -755,8 +755,6 @@
         this._lastRecalculateStylesEvent = null;
         this._currentScriptEvent = null;
         this._eventStack = [];
-        this._layerTreeActivatedAfterLoad = false;
-        this._expectFirstPaint = false;
     },
 
     /**
@@ -767,7 +765,6 @@
      */
     _processThreadEvents: function(startTime, endTime, mainThread, thread)
     {
-        var recordTypes = WebInspector.TimelineModel.RecordType;
         var events = thread.events();
         var length = events.length;
         var i = events.lowerBound(startTime, function (time, event) { return
time - event.startTime });
@@ -790,10 +787,6 @@
             if (endTime && event.startTime >= endTime)
                 break;
             this._processEvent(event);
-            if (this._expectFirstPaint && event.name === recordTypes.DrawFrame
&& this._layerTreeActivatedAfterLoad) {
-                threadEvents.push(new
WebInspector.TracingModel.Event(event.category, recordTypes.MarkFirstPaint,
WebInspector.TracingModel.Phase.Instant, event.startTime, event.thread));
-                this._expectFirstPaint = false;
-            }
             threadEvents.push(event);
             this._inspectedTargetEvents.push(event);
         }
@@ -820,6 +813,7 @@
     _processEvent: function(event)
     {
         var recordTypes = WebInspector.TimelineModel.RecordType;
+
         var eventStack = this._eventStack;
         while (eventStack.length && eventStack.peekLast().endTime <
event.startTime)
             eventStack.pop();
@@ -989,17 +983,6 @@
             event.backendNodeId = paintImageEvent.backendNodeId;
             event.imageURL = paintImageEvent.imageURL;
             break;
-
-        case recordTypes.MarkDOMContent:
-            if (!event.args["data"]["isMainFrame"])
-                break;
-            this._expectFirstPaint = true;
-            this._layerTreeActivatedAfterLoad = false;
-            break;
-
-        case recordTypes.ActivateLayerTree:
-            this._layerTreeActivatedAfterLoad = true;
-            break;
         }
     },

[caseq, 2014-11-26 17:00:11]

The CQ bit was checked by caseq@chromium.org

[commit-bot: I haz the power, 2014-11-26 17:00:58]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/761493004/120001

[commit-bot: I haz the power, 2014-11-26 17:01:34]

Committed patchset #2 (id:120001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=186039