Move version macros to public V8 header.

tools/v8-info.sh

Index: tools/v8-info.sh
diff --git a/tools/v8-info.sh b/tools/v8-info.sh
index 1f25d147a571ebe8d4c435f6507441c15437cd3c..b901736ced4f5aedbb3ba2e4d8377da40f84501c 100755
--- a/tools/v8-info.sh
+++ b/tools/v8-info.sh
@@ -30,11 +30,6 @@
 ########## Global variable definitions
 
 BASE_URL="https://code.google.com/p/v8/source/list"
-VERSION="src/version.cc"
-MAJOR="MAJOR_VERSION"
-MINOR="MINOR_VERSION"
-BUILD="BUILD_NUMBER"
-PATCH="PATCH_LEVEL"
 
 V8="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
 
@@ -111,11 +106,20 @@ svn_rev() {
 
 v8_rev() {
   cd $(git rev-parse --show-toplevel)
-  rev=$(git show $1:$VERSION \
+  # Newer revisions have version defines in include/v8.h.
+  rev=$(git show $1:include/v8.h \
       | grep "#define" \
-      | grep "$MAJOR\|$MINOR\|$BUILD\|$PATCH" \
+      | grep "V8_\(MAJOR_VERSION\|MINOR_VERSION\|BUILD_NUMBER\|PATCH_LEVEL\)" \
       | grep -o "[0-9]\+$" \
       | tr "\\n" ".")
+  if [[ -z ${rev%?} ]]; then
+    # Compatibility with revisions that have version defines in src/version.cc.
+    rev=$(git show $1:src/version.cc \
+        | grep "#define" \
+        | grep "\(MAJOR_VERSION\|MINOR_VERSION\|BUILD_NUMBER\|PATCH_LEVEL\)" \
+        | grep -o "[0-9]\+$" \
+        | tr "\\n" ".")
+  fi
   echo ${rev%?}
 }