Build ozone/linux_os with jessie sysroot when use_ozone=true

build/config/sysroot.gni

Index: build/config/sysroot.gni
diff --git a/build/config/sysroot.gni b/build/config/sysroot.gni
index 7fed8b3ee238a807611c9580fd51d53e7600bd06..e2d1bc1ffd0e980dbe075f0d49dc04dd0b0c7762 100644
--- a/build/config/sysroot.gni
+++ b/build/config/sysroot.gni
@@ -48,12 +48,17 @@ if (is_linux && target_sysroot_dir != "") {
   # By default build against a sysroot image downloaded from Cloud Storage
   # during gclient runhooks.
   if (is_chromeos) {
-    # Regular ChromeOS builds use custom sysroots, but desktop ChromeOS (where
-    # we're building linux desktop binaries but using the ChromeOS UI and
-    # functionality where possible) needs to run on the buliders, which are
-    # running precise.  The precise build has a different set of dependencies
-    # from the wheezy build, so we cannot use the wheezy sysroot.
-    sysroot = "//build/linux/ubuntu_precise_amd64-sysroot"
+    import("//ui/ozone/ozone.gni")

[Tom (Use chromium acct), 2017/01/18 19:02:18]

Move the added code into the else block (!is_chromeos), and keep the chromeos
build always using precise.

I can add libxkbcommon* to the precise sysroot since those packages are actually
available: 
http://packages.ubuntu.com/search?suite=precise&searchon=names&keywords=libxk...

[tonikitoo, 2017/01/20 20:26:21]

Done.

+    if (use_ozone && ozone_platform_wayland) {
+      sysroot = "//build/linux/debian_jessie_amd64-sysroot"
+    } else {
+      # Regular ChromeOS builds use custom sysroots, but desktop ChromeOS (where
+      # we're building linux desktop binaries but using the ChromeOS UI and
+      # functionality where possible) needs to run on the buliders, which are
+      # running precise.  The precise build has a different set of dependencies
+      # from the wheezy build, so we cannot use the wheezy sysroot.
+      sysroot = "//build/linux/ubuntu_precise_amd64-sysroot"
+    }
   } else {
     if (current_cpu == "x64") {
       sysroot = "//build/linux/debian_wheezy_amd64-sysroot"