DevTools: move tracing based Timeline out of experiment

LayoutTests/inspector/timeline/timeline-coalescing-expected.txt

Index: LayoutTests/inspector/timeline/timeline-coalescing-expected.txt
diff --git a/LayoutTests/inspector/timeline/timeline-coalescing-expected.txt b/LayoutTests/inspector/timeline/timeline-coalescing-expected.txt
index 1cdc3b16b9547d489efa6f727882d5af4af789dd..5a0eba7938084efb94d6ac88035e10817f5bd4f3 100644
--- a/LayoutTests/inspector/timeline/timeline-coalescing-expected.txt
+++ b/LayoutTests/inspector/timeline/timeline-coalescing-expected.txt
@@ -1,23 +1,24 @@
 Test timeline records coalescing
 
 Root 
-----> Layout x 3 duration: 299.89900:299.89900 (rendering: 299.69700)
---------> Layout duration: 99.89900:99.89900 (rendering: 99.89900)
---------> Layout duration: 99.89900:99.89900 (rendering: 99.89900)
---------> Layout duration: 99.89900:99.89900 (rendering: 99.89900)
+----> FunctionCall duration: 299.99800:299.99800 (other: 0.00100, scripting: 0.30100, rendering: 299.69700)
+--------> Layout x 3 duration: 299.89900:299.89900 (rendering: 299.69700)
+------------> Layout duration: 99.89900:99.89900 (rendering: 99.89900)
+------------> Layout duration: 99.89900:99.89900 (rendering: 99.89900)
+------------> Layout duration: 99.89900:99.89900 (rendering: 99.89900)
 ----> Layout duration: 94.89900:94.89900 (rendering: 94.89900)
-----> FunctionCall duration: 199.99700:199.99700 (painting: 199.79800, scripting: 0.19900)
---------> DecodeImage x 2 duration: 199.89800:199.89800 (painting: 199.79800)
-------------> DecodeImage duration: 99.89800:99.89800 (painting: 99.89800)
-------------> DecodeImage duration: 99.90000:99.90000 (painting: 99.90000)
-----> FunctionCall duration: 199.99700:199.99700 (painting: 199.79800, scripting: 0.19900)
---------> DecodeImage x 2 duration: 199.89800:199.89800 (painting: 199.79800)
-------------> DecodeImage duration: 99.89800:99.89800 (painting: 99.89800)
-------------> DecodeImage duration: 99.90000:99.90000 (painting: 99.90000)
-----> Rasterize x 3 duration: 299.89900:299.89900 (painting: 299.69700)
---------> Rasterize duration: 99.89900:99.89900 (painting: 99.89900)
---------> Rasterize duration: 99.89900:99.89900 (painting: 99.89900)
---------> Rasterize duration: 99.89900:99.89900 (painting: 99.89900)
+----> FunctionCall duration: 199.99700:199.99700 (scripting: 0.19900, painting: 199.79800)
+--------> Decode Image x 2 duration: 199.89800:199.89800 (painting: 199.79800)
+------------> Decode Image duration: 99.89800:99.89800 (painting: 99.89800)
+------------> Decode Image duration: 99.90000:99.90000 (painting: 99.90000)
+----> FunctionCall duration: 199.99700:199.99700 (scripting: 0.19900, painting: 199.79800)
+--------> Decode Image x 2 duration: 199.89800:199.89800 (painting: 199.79800)
+------------> Decode Image duration: 99.89800:99.89800 (painting: 99.89800)
+------------> Decode Image duration: 99.90000:99.90000 (painting: 99.90000)
+----> RasterTask x 3 duration: 299.89900:299.89900 (painting: 299.69700)
+--------> RasterTask duration: 99.89900:99.89900 (painting: 99.89900)
+--------> RasterTask duration: 99.89900:99.89900 (painting: 99.89900)
+--------> RasterTask duration: 99.89900:99.89900 (painting: 99.89900)
 ----> Paint x 3 duration: 299.89900:299.89900 (painting: 299.69700)
 --------> Paint duration: 99.89900:99.89900 (painting: 99.89900)
 --------> Paint duration: 99.89900:99.89900 (painting: 99.89900)