cc: Add layer raster tile iterator construct perftest

cc: Add layer raster tile iterator construct perftest

This patch adds a layer level raster tile perftest to measure how
expensive is it to create a layer raster tile iterator.

Initial run:
[ RUN      ] PictureLayerImplPerfTest.LayerRasterTileIteratorConstructAndIterate
*RESULT layer_raster_tile_iterator_construct_and_iterate: 32_100x100= 389462.09375 runs/s
*RESULT layer_raster_tile_iterator_construct_and_iterate: 32_500x500= 392804.6875 runs/s
*RESULT layer_raster_tile_iterator_construct_and_iterate: 64_100x100= 230574.3125 runs/s
*RESULT layer_raster_tile_iterator_construct_and_iterate: 64_500x500= 230933.953125 runs/s
[       OK ] PictureLayerImplPerfTest.LayerRasterTileIteratorConstructAndIterate (8408 ms)
[ RUN      ] PictureLayerImplPerfTest.LayerRasterTileIteratorConstruct
*RESULT layer_raster_tile_iterator_construct: 0_0_100x100= 2187284 runs/s
*RESULT layer_raster_tile_iterator_construct: 5000_0_100x100= 1882842.125 runs/s
*RESULT layer_raster_tile_iterator_construct: 9999_0_100x100= 2171275 runs/s
[       OK ] PictureLayerImplPerfTest.LayerRasterTileIteratorConstruct (7619 ms)

NOTE TO PERF SHERIFFS
---------------------
This patch replaces layer_raster_tile_iterator test with
layer_raster_tile_iterator_construct_and_iterate test.

R=reveman

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=284105

[vmpstr, 2014-07-17 17:09:46]

PTAL

[reveman, 2014-07-17 17:52:20]

lgtm

[vmpstr, 2014-07-17 18:30:26]

The CQ bit was checked by vmpstr@chromium.org

[commit-bot: I haz the power, 2014-07-17 18:33:43]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/vmpstr@chromium.org/400753002/20001

[commit-bot: I haz the power, 2014-07-17 22:03:42]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  android_dbg_triggered_tests on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_dbg_triggered...)

[commit-bot: I haz the power, 2014-07-17 22:25:48]

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

[commit-bot: I haz the power, 2014-07-17 22:25:49]

Try jobs failed on following builders:
  android_dbg_triggered_tests on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_dbg_triggered...)

[vmpstr, 2014-07-18 15:54:23]

The CQ bit was checked by vmpstr@chromium.org

[commit-bot: I haz the power, 2014-07-18 15:55:47]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/vmpstr@chromium.org/400753002/20001

[commit-bot: I haz the power, 2014-07-18 16:02:42]

Change committed as 284105