Timeline: fill frames according to CPU time spent per event category

LayoutTests/inspector/timeline/tracing/frame-model-expected.txt

Index: LayoutTests/inspector/timeline/tracing/frame-model-expected.txt
diff --git a/LayoutTests/inspector/timeline/timeline-frame-model-expected.txt b/LayoutTests/inspector/timeline/tracing/frame-model-expected.txt
similarity index 71%
copy from LayoutTests/inspector/timeline/timeline-frame-model-expected.txt
copy to LayoutTests/inspector/timeline/tracing/frame-model-expected.txt
index fe5b410375508ca4e49caa3e1714a46f8b1f8ef5..c4f1ea9d517738957f3c6daef93340ada8ffd967 100644
--- a/LayoutTests/inspector/timeline/timeline-frame-model-expected.txt
+++ b/LayoutTests/inspector/timeline/tracing/frame-model-expected.txt
@@ -2,23 +2,22 @@ Test timeline records coalescing
 
 Test: main thread only
 {
-    cpuTime : 3.999
+    cpuTime : 4.001
     duration : 16
     endTime : 1016.001
     startTime : 1000.001
     timeByCategory : {
-        other : 0.002
-        rendering : 0
+        other : 0.004
         scripting : 3.997
     }
 }
 {
-    cpuTime : 10.999
+    cpuTime : 12.994
     duration : 16
     endTime : 1032.001
     startTime : 1016.001
     timeByCategory : {
-        other : 2.003
+        other : 3.998
         rendering : 5.999
         scripting : 2.997
     }
@@ -30,7 +29,6 @@ Test: main thread only
     startTime : 1032.001
     timeByCategory : {
         other : 1.999
-        rendering : 0
     }
 }
 Test: impl-side only
@@ -40,7 +38,6 @@ Test: impl-side only
     endTime : 1030
     startTime : 1000
     timeByCategory : {
-        rendering : 0
     }
 }
 {
@@ -49,8 +46,6 @@ Test: impl-side only
     endTime : 1046
     startTime : 1030
     timeByCategory : {
-        other : 0
-        rendering : 0
     }
 }
 {
@@ -59,9 +54,7 @@ Test: impl-side only
     endTime : 1078
     startTime : 1046
     timeByCategory : {
-        other : 0
         painting : 2.997
-        rendering : 0
     }
 }
 {
@@ -70,79 +63,68 @@ Test: impl-side only
     endTime : 1081
     startTime : 1078
     timeByCategory : {
-        other : 0
-        rendering : 0
     }
 }
 Test: impl-side with commits
 {
-    cpuTime : 32.999
+    cpuTime : 31.995
     duration : 46
     endTime : 1046
     startTime : 1000
     timeByCategory : {
-        other : 1.004
+        other : 1.999
         painting : 1.999
-        rendering : 11.999
+        rendering : 10
         scripting : 17.997
     }
 }
 {
-    cpuTime : 11.999
+    cpuTime : 0.010997
     duration : 16
     endTime : 1062
     startTime : 1046
     timeByCategory : {
-        other : 1.002
-        painting : 10.997
-        rendering : 0
+        painting : 0.010997
     }
 }
 Test: impl-side with interleaving commits
 {
-    cpuTime : 12.999
+    cpuTime : 0.012997
     duration : 14.001
     endTime : 1014.001
     startTime : 1000
     timeByCategory : {
-        other : 0.002
-        painting : 12.997
-        rendering : 0
+        painting : 0.012997
     }
 }
 {
-    cpuTime : 12.999
+    cpuTime : 12.996
     duration : 16
     endTime : 1030.001
     startTime : 1014.001
     timeByCategory : {
-        other : 0.003
         painting : 3.999
-        rendering : 0
         scripting : 8.997
     }
 }
 {
-    cpuTime : 8.002
+    cpuTime : 7.999
     duration : 16
     endTime : 1046.001
     startTime : 1030.001
     timeByCategory : {
-        other : 0.005
-        painting : 7.997
-        rendering : 0
+        painting : 7.999
     }
 }
 Test: pre-frame time accounting
 {
-    cpuTime : 0.999
+    cpuTime : 1.398
     duration : 3.001
     endTime : 1035.001
     startTime : 1032
     timeByCategory : {
-        other : 0.003
         painting : 0.598
-        rendering : 0.398
+        rendering : 0.8
     }
 }
 {
@@ -151,53 +133,46 @@ Test: pre-frame time accounting
     endTime : 1063.001
     startTime : 1035.001
     timeByCategory : {
-        other : 0
-        rendering : 0
     }
 }
 {
-    cpuTime : 20.998
+    cpuTime : 5.999
     duration : 8.001
     endTime : 1071.002
     startTime : 1063.001
     timeByCategory : {
-        other : 6.005
+        other : 0.003
         painting : 2.998
         rendering : 2.998
-        scripting : 8.997
     }
 }
 {
-    cpuTime : 0
+    cpuTime : 3.997
     duration : 10
     endTime : 1081.002
     startTime : 1071.002
     timeByCategory : {
-        other : 0
-        rendering : 0
+        other : 0.001
+        painting : 0.998
+        rendering : 2.998
     }
 }
 {
-    cpuTime : 8.998
+    cpuTime : 0
     duration : 15
     endTime : 1096.002
     startTime : 1081.002
     timeByCategory : {
-        other : 1.003
-        painting : 0.998
-        rendering : 6.997
     }
 }
 Test: record processing order
 {
-    cpuTime : 15.999
+    cpuTime : 15.994
     duration : 13.005
     endTime : 1013.005
     startTime : 1000
     timeByCategory : {
-        other : 0.005
         painting : 3.997
-        rendering : 0
         scripting : 11.997
     }
 }
@@ -207,20 +182,24 @@ Test: record processing order
     endTime : 1030.001
     startTime : 1013.005
     timeByCategory : {
-        other : 0
-        rendering : 0
     }
 }
 {
-    cpuTime : 31.999
+    cpuTime : 30.994
     duration : 32
     endTime : 1062.001
     startTime : 1030.001
     timeByCategory : {
-        other : 1.005
         painting : 19.997
-        rendering : 0
         scripting : 10.997
     }
 }
+{
+    cpuTime : 0
+    duration : 18
+    endTime : 1080.001
+    startTime : 1062.001
+    timeByCategory : {
+    }
+}