Add media/test/data to content_browsertests and browser_tests isolate files.

The media browser tests (content and chrome) load data from media/test/data.

BUG=379314

Review URL: https://codereview.chromium.org/399693002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@283757 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser_tests.isolate

@@ -67,6 +67,7 @@
         ],
         'isolate_dependency_untracked': [
           '../content/test/data/',
+          '../media/test/data/',
           '../net/data/',
           '../net/tools/testserver/',
           '../third_party/WebKit/Tools/Scripts/',

content/content_browsertests.isolate

@@ -13,6 +13,7 @@
     ['OS=="android" or OS=="linux" or OS=="mac" or OS=="win"', {
       'variables': {
         'isolate_dependency_untracked': [
+          '../media/test/data/',
           '../net/data/',
           'test/data/',
         ],