Check in 2x slider bar resources.

Check in 2x slider bar resources, also slightly adjust 1x resource files for slider_thumb.png and slider_thumb_disabled.png.


BUG=140077
TBR=sky,oshima

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=149500

[commit-bot: I haz the power, 2012-08-01 21:07:52]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/jennyz@chromium.org/10824133/1

[commit-bot: I haz the power, 2012-08-01 21:07:57]

Presubmit check for 10824133-1 failed and returned exit status 1.

Running presubmit commit checks ...
Traceback (most recent call last):
  File "/b/commit-queue/verification/presubmit_shim.py", line 43, in <module>
    sys.exit(presubmit_support.Main(argv))
  File "/b/depot_tools/presubmit_support.py", line 1257, in Main
    rietveld_obj)
  File "/b/depot_tools/presubmit_support.py", line 1105, in DoPresubmitChecks
    results += executer.ExecPresubmitScript(presubmit_script, filename)
  File "/b/depot_tools/presubmit_support.py", line 1022, in ExecPresubmitScript
    result = eval(function_name + '(*__args)', context)
  File "<string>", line 1, in <module>
  File "<string>", line 19, in CheckChangeOnCommit
  File "<string>", line 43, in _CommonChecks
  File
"/b/commit-queue/workdir/chromium/ui/resources/resource_check/resource_scale_factors.py",
line 93, in RunChecks
    width, height = ImageSize(image_path)
  File
"/b/commit-queue/workdir/chromium/ui/resources/resource_check/resource_scale_factors.py",
line 47, in ImageSize
    assert data[:8] == '\x89PNG\r\n\x1A\n' and data[12:16] == 'IHDR'
AssertionError

[commit-bot: I haz the power, 2012-08-01 21:18:35]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/jennyz@chromium.org/10824133/10001

[commit-bot: I haz the power, 2012-08-01 21:18:41]

Presubmit check for 10824133-10001 failed and returned exit status 1.

Running presubmit commit checks ...

** Presubmit Messages **
--tbr was specified, skipping OWNERS check

** Presubmit ERRORS **
Image ui/resources/default_200_percent/slider_center_active.png is 9x13,
expected to be 18x26

Image ui/resources/default_200_percent/slider_center_disabled.png is 9x13,
expected to be 18x26

Image ui/resources/default_200_percent/slider_center_pressed.png is 9x13,
expected to be 18x26

Presubmit checks took 2.3s to calculate.