Adjust the footer layout in ClearBrowsingDataPreferences

Adjust the footer layout in ClearBrowsingDataPreferences

1. According to the material design specification, the icon in the footer
   should be aligned with the top of the footer text. However, this does
   not look correctly, as there is still empty space between the top of
   the TextView and the actual top of the tallest letter. Therefore, we
   lower the icon a few pixels to match the ascender line of the font.

2. The default padding of preferences is 16dp. This means that the spacing
   around the two footer paragraphs is 16dp-32dp-16dp. Our mocks require
   16dp-16dp-24dp. We therefore define the default bottom padding to be 24dp,
   leading to 16dp-40dp-24dp, then remove the bottom padding of the first
   paragraph, leading to the correct 16dp-16dp-24dp.

BUG=602253
Review URL: https://codereview.chromium.org/1872363002

Cr-Commit-Position: refs/heads/master@{#386951}
(cherry picked from commit 5301cfa576d36e6d84acd6e2ca33f74047140ed9)

Committed: https://chromium.googlesource.com/chromium/src/+/79865a7346184c429005aba0355262951e1f0d3b

[msramek, 2016-04-14 09:50:46]

Description was changed from

==========
Adjust the footer layout in ClearBrowsingDataPreferences

1. According to the material design specification, the icon in the footer
   should be aligned with the top of the footer text. However, this does
   not look correctly, as there is still empty space between the top of
   the TextView and the actual top of the tallest letter. Therefore, we
   lower the icon a few pixels to match the ascender line of the font.

2. The default padding of preferences is 16dp. This means that the spacing
   around the two footer paragraphs is 16dp-32dp-16dp. Our mocks require
   16dp-16dp-24dp. We therefore define the default bottom padding to be 24dp,
   leading to 16dp-40dp-24dp, then remove the bottom padding of the first
   paragraph, leading to the correct 16dp-16dp-24dp.

BUG=602253

Review URL: https://codereview.chromium.org/1872363002

Cr-Commit-Position: refs/heads/master@{#386951}
(cherry picked from commit 5301cfa576d36e6d84acd6e2ca33f74047140ed9)
==========

to

==========
Adjust the footer layout in ClearBrowsingDataPreferences

1. According to the material design specification, the icon in the footer
   should be aligned with the top of the footer text. However, this does
   not look correctly, as there is still empty space between the top of
   the TextView and the actual top of the tallest letter. Therefore, we
   lower the icon a few pixels to match the ascender line of the font.

2. The default padding of preferences is 16dp. This means that the spacing
   around the two footer paragraphs is 16dp-32dp-16dp. Our mocks require
   16dp-16dp-24dp. We therefore define the default bottom padding to be 24dp,
   leading to 16dp-40dp-24dp, then remove the bottom padding of the first
   paragraph, leading to the correct 16dp-16dp-24dp.

BUG=602253

Review URL: https://codereview.chromium.org/1872363002

Cr-Commit-Position: refs/heads/master@{#386951}
(cherry picked from commit 5301cfa576d36e6d84acd6e2ca33f74047140ed9)

Committed:
https://chromium.googlesource.com/chromium/src/+/79865a7346184c429005aba03552...
==========

[msramek, 2016-04-14 09:50:48]

Committed patchset #1 (id:1) manually as
79865a7346184c429005aba0355262951e1f0d3b.