mac: Use ninja by default.

chrome/installer/mac/dirdiffer.sh

Index: chrome/installer/mac/dirdiffer.sh
diff --git a/chrome/installer/mac/dirdiffer.sh b/chrome/installer/mac/dirdiffer.sh
index 2e819289d713b3f2796be50efce391c3c81ce6e8..cd8f673fe033ffe21095925b0b2e84a046c23d4e 100755
--- a/chrome/installer/mac/dirdiffer.sh
+++ b/chrome/installer/mac/dirdiffer.sh
@@ -106,7 +106,7 @@ shopt -s dotglob nullglob
 # find_tool looks for an executable file named |tool_name|:
 #  - in the same directory as this script,
 #  - if this script is located in a Chromium source tree, at the expected
-#    Release output location in the Mac xcodebuild directory,
+#    Release output location in the Mac out directory,
 #  - as above, but in the Debug output location
 # If found in any of the above locations, the script's path is output.
 # Otherwise, this function outputs |tool_name| as a fallback, allowing it to
@@ -126,13 +126,13 @@ find_tool() {
   local script_dir_phys
   script_dir_phys="$(cd "${script_dir}" && pwd -P)"
   if [[ "${script_dir_phys}" =~ ^(.*)/src/chrome/installer/mac$ ]]; then
-    tool="${BASH_REMATCH[1]}/src/xcodebuild/Release/${tool_name}"
+    tool="${BASH_REMATCH[1]}/src/out/Release/${tool_name}"

[Mark Mentovai, 2013/10/25 12:58:19]

You can make this check the ninja locations, and if it’s not found there, then
the xcode locations.

[Nico, 2013/10/25 14:14:45]

I had this at first (see diff from patch set 1 to 2 to see how I incompletely
reverted that change), but then I realized that this is changing in the same CL
as the generator default – so if this CL is reverted, both the generator change
and this file get reverted in the same revision. So I think just using the
canonical location here should be enough.

     if [[ -f "${tool}" ]] && [[ -x "${tool}" ]]; then
       echo "${tool}"
       return
     fi
 
-    tool="${BASH_REMATCH[1]}/src/xcodebuild/Debug/${tool_name}"
+    tool="${BASH_REMATCH[1]}/src/out/Debug/${tool_name}"
     if [[ -f "${tool}" ]] && [[ -x "${tool}" ]]; then
       echo "${tool}"
       return