Add unit_tests (Chrome browser unit tests) to Mac/Linux coverage.

Minor fixes to coverage related scripts.

Review URL: http://codereview.chromium.org/118298

git-svn-id: http://src.chromium.org/svn/trunk/src/build@17785 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

linux/chrome_linux.croc

@@ -7,7 +7,7 @@
     # Files/paths to include.  Specify these before the excludes, since rules
     # are in order.
     {
-      'regexp' : '^CHROMIUM/(base|media|net|printing)/',
+      'regexp' : '^CHROMIUM/(base|media|net|printing|chrome|v8|webkit/glue)/',
       'include' : 1,
     },
     # Don't include subversion or mercurial SCM dirs

mac/chrome_mac.croc

@@ -7,7 +7,7 @@
     # Files/paths to include.  Specify these before the excludes, since rules
     # are in order.
     {
-      'regexp' : '^CHROMIUM/(base|media|net|printing)/',
+      'regexp' : '^CHROMIUM/(base|media|net|printing|chrome|v8|webkit/glue)/',
       'include' : 1,
     },
     # Don't include subversion or mercurial SCM dirs