Define ARCH_X86_32 and ARCH_X86_64

X86_32 is never used assembly files(*.asm, *.inc), define ARCH_X86_64 or
ARCH_X86_32 instead.

BUG=None
TEST=build and run chrome and content_shell with media tests.

Review URL: https://codereview.chromium.org/170073002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251977 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251977
Fix BrowserActionApiTest.DynamicBrowserAction interaction with dev-mode highlighting.

With dev-mode highlighting (on stable/beta channel, or with the --force-dev-mode-highlighting=1 flag), in Views, unpacked extension browser action iicons (such as the ones in this test) are given a different background. Adjust our test expectations accordingly.

This patch also cleans up the other BrowserActionApiTests somewhat.

BUG=333008
TEST=browser_tests --gtest_filter=BrowserActionApiTest.DynamicBrowserAction --force-dev-mode-highlighting=1

Review URL: https://codereview.chromium.org/170843005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251978 0039d316-1c4b-4281-b951-d872f2087c98
[Telemetry] Clean up some page cycler cruft now that idb has moved out.

The Indexed DB page cycler has been replaced by a real benchmark. So we no
longer need the age-old hacks to do idb testing via a page cycler.

BUG=196406
TBR=cmumford@chromium.org

Review URL: https://codereview.chromium.org/148093016

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251979 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251979