Timeline: fix frame offsets in Timeline details

third_party/WebKit/LayoutTests/inspector/tracing/frame-model-expected.txt

 Test the frames are correctly built based on trace events
 
 Test: main thread only
+23.00 ms (at 1.00 s)
 {
     cpuTime : 11.998
     duration : 23
     endTime : 1027.002
     idle : false
     startTime : 1004.002
     timeByCategory : {
         other : 2.003
         painting : 0.999
         rendering : 5.999
         scripting : 2.997
     }
 }
+5.00 ms (at 1.03 s)
 {
     cpuTime : 1.999
     duration : 5.002
     endTime : 1032.004
     idle : false
     startTime : 1027.002
     timeByCategory : {
         other : 1
         painting : 0.999
     }
 }
+16.00 ms (at 1.03 s)
 {
     cpuTime : 1.999
     duration : 16
     endTime : 1048.004
     idle : false
     startTime : 1032.004
     timeByCategory : {
         other : 1
         painting : 0.999
     }
 }
 Test: impl-side only
+30.00 ms (at 999.90 ms)
 {
     cpuTime : 0
     duration : 30
     endTime : 1030
     idle : false
     startTime : 1000
     timeByCategory : {
     }
 }
+16.00 ms (at 1.03 s)
 {
     cpuTime : 0
     duration : 16
     endTime : 1046
     idle : false
     startTime : 1030
     timeByCategory : {
     }
 }
+32.00 ms (at 1.05 s)
 {
     cpuTime : 2.997
     duration : 32
     endTime : 1078
     idle : false
     startTime : 1046
     timeByCategory : {
         painting : 2.997
     }
 }
+3.00 ms (at 1.08 s)
 {
     cpuTime : 0
     duration : 3
     endTime : 1081
     idle : false
     startTime : 1078
     timeByCategory : {
     }
 }
 Test: impl-side with commits
+46.00 ms (at 999.90 ms)
 {
     cpuTime : 32.999
     duration : 46
     endTime : 1046
     idle : false
     startTime : 1000
     timeByCategory : {
         other : 3.003
         painting : 1.999
         rendering : 10
         scripting : 17.997
     }
 }
+16.00 ms (at 1.05 s)
 {
     cpuTime : 11.999
     duration : 16
     endTime : 1062
     idle : false
     startTime : 1046
     timeByCategory : {
         other : 11.988003
         painting : 0.010997
     }
 }
 Test: impl-side with interleaving commits
+14.00 ms (at 999.90 ms)
 {
     cpuTime : 12.999
     duration : 14.001
     endTime : 1014.001
     idle : false
     startTime : 1000
     timeByCategory : {
         other : 12.986003
         painting : 0.012997
     }
 }
+16.00 ms (at 1.01 s)
 {
     cpuTime : 12.999
     duration : 16
     endTime : 1030.001
     idle : false
     startTime : 1014.001
     timeByCategory : {
         other : 0.003
         painting : 3.999
         scripting : 8.997
     }
 }
+16.00 ms (at 1.03 s)
 {
     cpuTime : 12.999
     duration : 16
     endTime : 1046.001
     idle : false
     startTime : 1030.001
     timeByCategory : {
         other : 0.003
         painting : 7.999
         scripting : 4.997
     }
 }
 Test: pre-frame time accounting
+3.00 ms (at 1.03 s)
 {
     cpuTime : 32.998
     duration : 3.001
     endTime : 1035.001
     idle : false
     startTime : 1032
     timeByCategory : {
         other : 2.603
         painting : 0.598
         rendering : 0.8
         scripting : 28.997
     }
 }
+28.00 ms (at 1.03 s)
 {
     cpuTime : 0
     duration : 28
     endTime : 1063.001
     idle : false
     startTime : 1035.001
     timeByCategory : {
     }
 }
+8.00 ms (at 1.06 s)
 {
     cpuTime : 20.998
     duration : 8.001
     endTime : 1071.002
     idle : false
     startTime : 1063.001
     timeByCategory : {
         other : 6.005
         painting : 2.998
         rendering : 2.998
         scripting : 8.997
     }
 }
+10.00 ms (at 1.07 s)
 {
     cpuTime : 8.998
     duration : 10
     endTime : 1081.002
     idle : false
     startTime : 1071.002
     timeByCategory : {
         other : 5.002
         painting : 0.998
         rendering : 2.998
     }
 }
+15.00 ms (at 1.08 s)
 {
     cpuTime : 0
     duration : 15
     endTime : 1096.002
     idle : false
     startTime : 1081.002
     timeByCategory : {
     }
 }
 Test: record processing order
+13.00 ms (at 999.90 ms)
 {
     cpuTime : 15.999
     duration : 13.005
     endTime : 1013.005
     idle : false
     startTime : 1000
     timeByCategory : {
         other : 0.005
         painting : 3.997
         scripting : 11.997
     }
 }
+17.00 ms (at 1.01 s)
 {
     cpuTime : 0
     duration : 16.996
     endTime : 1030.001
     idle : false
     startTime : 1013.005
     timeByCategory : {
     }
 }
+32.00 ms (at 1.03 s)
 {
     cpuTime : 31.999
     duration : 32
     endTime : 1062.001
     idle : false
     startTime : 1030.001
     timeByCategory : {
         other : 1.005
         painting : 19.997
         scripting : 10.997
     }
 }
+18.00 ms (at 1.06 s)
 {
     cpuTime : 0
     duration : 18
     endTime : 1080.001
     idle : false
     startTime : 1062.001
     timeByCategory : {
     }
 }
 Test: commits without activation
+14.00 ms (at 999.90 ms)
 {
     cpuTime : 0
     duration : 14.001
     endTime : 1014.001
     idle : false
     startTime : 1000
     timeByCategory : {
     }
 }
+16.00 ms (at 1.01 s)
 {
     cpuTime : 0
     duration : 16
     endTime : 1030.001
     idle : false
     startTime : 1014.001
     timeByCategory : {
     }
 }
+16.00 ms (at 1.03 s)
 {
     cpuTime : 0
     duration : 16
     endTime : 1046.001
     idle : false
     startTime : 1030.001
     timeByCategory : {
     }
 }
 Test: Idle frames
+14.00 ms (at 999.90 ms)
 {
     cpuTime : 0
     duration : 14.001
     endTime : 1014.001
     idle : false
     startTime : 1000
     timeByCategory : {
     }
 }
+250.00 ms (at 1.01 s)
 {
     cpuTime : 0
     duration : 249.999
     endTime : 1264
     idle : true
     startTime : 1014.001
     timeByCategory : {
     }
 }
+32.00 ms (at 1.26 s)
 {
     cpuTime : 24
     duration : 32.001
     endTime : 1296.001
     idle : false
     startTime : 1264
     timeByCategory : {
         other : 0.5
         painting : 0.5
         scripting : 23
     }
 }
+16.00 ms (at 1.30 s)
 {
     cpuTime : 0
     duration : 15.999
     endTime : 1312
     idle : false
     startTime : 1296.001
     timeByCategory : {
     }
 }