DevTools: switch Timeline frontend into buffered mode and remove the corresponding experiment.

LayoutTests/inspector/timeline/timeline-window-filter-expected.txt

Index: LayoutTests/inspector/timeline/timeline-window-filter-expected.txt
diff --git a/LayoutTests/inspector/timeline/timeline-window-filter-expected.txt b/LayoutTests/inspector/timeline/timeline-window-filter-expected.txt
index a48e8b11c40ef87654d55a611e69e98bcc1963d1..0c2552c7d88088b83caeeee4c25764c70b97e600 100644
--- a/LayoutTests/inspector/timeline/timeline-window-filter-expected.txt
+++ b/LayoutTests/inspector/timeline/timeline-window-filter-expected.txt
@@ -33,15 +33,15 @@ divider offsets: [0, 200, 400, 600, 800, 1000]. We are expecting round numbers.
 
 mode = Frames
 range = 0.25 - 0.75
-time range = 1390988669438.409 - 1390988670098.158
-records count: 47
-divider offsets: [400, 500, 600, 700, 800, 900, 1000]. We are expecting round numbers.
+time range = 1390988669365.8047 - 1390988669866.5461

[yurys, 2014/07/17 10:42:24]

Why did this change?

+records count: 49
+divider offsets: [300, 400, 500, 600, 700, 800]. We are expecting round numbers.
 
 mode = Frames
 range = 0.33 - 0.66
-time range = 1390988669535.377 - 1390988670098.158
-records count: 38
-divider offsets: [500, 600, 700, 800, 900, 1000]. We are expecting round numbers.
+time range = 1390988669445.9233 - 1390988669776.4126
+records count: 34
+divider offsets: [350, 400, 450, 500, 550, 600, 650, 700]. We are expecting round numbers.
 
 mode = Frames
 range = 0 - 1
@@ -50,21 +50,21 @@ divider offsets: [200, 400, 600, 800, 1000]. We are expecting round numbers.
 
 mode = Frames
 range = 0.25 - 0.5
-time range = 1390988669438.409 - 1390988669752.828
-divider offsets: [350, 400, 450, 500, 550, 600]. We are expecting round numbers.
+time range = 1390988669365.8047 - 1390988669616.1753
+divider offsets: [300, 350, 400, 450, 500]. We are expecting round numbers.
 
 mode = Frames
 range = 0.33 - 0.4
-time range = 1390988669535.377 - 1390988669648.884
-divider offsets: [440, 460, 480, 500, 520]. We are expecting round numbers.
+time range = 1390988669445.9233 - 1390988669516.027
+divider offsets: [340, 350, 360, 370, 380, 390, 400]. We are expecting round numbers.
 
 --------------------------------------------------------
 mode = Frames
-time range = 1390988669264.497 - 1390988670098.158
+time range = 1390988669215.582 - 1390988670016.7686
 
 mode = Events
-time range = 1390988669264.497 - 1390988670098.158
+time range = 1390988669215.582 - 1390988670016.7686
 
 mode = Frames
-time range = 1390988669264.497 - 1390988670098.158
+time range = 1390988669215.582 - 1390988670016.7686