* Upstream release: 75.0.3770.80
  - CVE-2019-5828: Use after free in ServiceWorker.
  - CVE-2019-5829: Use after free in Download Manager.
  - CVE-2019-5830: Incorrectly credentialed requests in CORS.
  - CVE-2019-5831: Incorrect map processing in V8.
  - CVE-2019-5832: Incorrect CORS handling in XHR.
  - CVE-2019-5833: Inconsistent security UI placement.
  - CVE-2019-5834: URL spoof in Omnibox on iOS.
  - CVE-2019-5835: Out of bounds read in Swiftshader.
  - CVE-2019-5836: Heap buffer overflow in Angle.
  - CVE-2019-5837: Cross-origin resources size disclosure in Appcache.
  - CVE-2019-5838: Overly permissive tab access in Extensions.
  - CVE-2019-5839: Incorrect handling of certain code points in Blink.
  - CVE-2019-5840: Popup blocker bypass.
* debian/rules: replace deprecated remove_webcore_debug_symbols build flag by blink_symbol_level
* debian/patches/arm-neon.patch: removed, no longer needed
* debian/patches/disable-sse2: refreshed
* debian/patches/fix-extra-arflags.patch: refreshed
* debian/patches/pffft-no-neon.patch: added
* debian/patches/revert-gn-4960.patch: removed, no longer needed
* debian/patches/revert-gn-4980.patch: removed, no longer needed
* debian/patches/revert-Xclang-instcombine-lower-dbg-declare.patch: removed, no longer needed
* debian/patches/search-credit.patch: refreshed
* debian/patches/set-rpath-on-chromium-executables.patch: refreshed
* debian/patches/suppress-newer-clang-warning-flags.patch: updated
* debian/patches/widevine-enable-version-string.patch: refreshed
* debian/known_gn_gen_args-*: remove remove_webcore_debug_symbols build flag
* debian/tests/chromium-version: update test to account for an undocumented chromedriver API change
* debian/tests/html5test: update test expectations