Backed out changesets f0459f2356bc, e66e54290fe6, and 1fb834da769c for Windows Bustage. a=backout on a CLOSED TREE
Bug 838807: Flatten all icons. [r=mfinkle] [a=bbajaj]

--HG--
rename : mobile/android/base/resources/drawable-large-hdpi-v11/ic_menu_bookmark_add.png => mobile/android/base/resources/drawable-xlarge-hdpi-v11/ic_menu_bookmark_add.png
rename : mobile/android/base/resources/drawable-large-hdpi-v11/ic_menu_bookmark_remove.png => mobile/android/base/resources/drawable-xlarge-hdpi-v11/ic_menu_bookmark_remove.png
rename : mobile/android/base/resources/drawable-large-mdpi-v11/ic_menu_bookmark_add.png => mobile/android/base/resources/drawable-xlarge-mdpi-v11/ic_menu_bookmark_add.png
rename : mobile/android/base/resources/drawable-large-mdpi-v11/ic_menu_bookmark_remove.png => mobile/android/base/resources/drawable-xlarge-mdpi-v11/ic_menu_bookmark_remove.png
rename : mobile/android/base/resources/drawable-large-xhdpi-v11/ic_menu_bookmark_add.png => mobile/android/base/resources/drawable-xlarge-xhdpi-v11/ic_menu_bookmark_add.png
rename : mobile/android/base/resources/drawable-large-xhdpi-v11/ic_menu_bookmark_remove.png => mobile/android/base/resources/drawable-xlarge-xhdpi-v11/ic_menu_bookmark_remove.png
extra : rebase_source : 881191353830c3525337fc5ec388870084559103
Bug 838807: Replace tab-carats. [r=mfinkle] [a=bbajaj]

--HG--
extra : rebase_source : b6668f0e57a4abf2b9c8039f287291ff33606933
Bug 838735: Remove transparency from inactive tabs. [r=mfinkle] [a=bbajaj]

--HG--
extra : rebase_source : a33c4f12d85509a19b4b6f0969257722837bd8b5
Bug 838748: Change pressed state of tabs-ui rows. [r=mfinkle] [a=bbajaj]

--HG--
extra : rebase_source : ab20f10a7da7754528d526e914cf083b25bbd964
Bug 838807: Remove tablet specific tabs-ui icons. [r=mfinkle] [a=bbajaj]

--HG--
extra : rebase_source : abddb8d42a0d04cb753f4769b6bc660c46617004
Bug 818072: Back/Forward looks disabled. [r=mfinkle] [a=bbajaj] [needs-clobber]

--HG--
extra : rebase_source : dd20022c2f86c9db7eb94947accef652118b70a3
Bug 837845 - Manually backout the largest memory users from bug 798624; r=Waldo a=lsblakk

--HG--
extra : rebase_source : 55e61500dac9d0ab84706ff688124c7b0a03fd66
Bug 830676 - YarrJIT is broken on Win64 after landing bug 820124. r=sstangl, a=lsblakk
Bug 834762 - yarr/MatchResult.h:58:44: warning: overflow in implicit constant conversion [-Woverflow].  r=warning-spam, a=lsblakk