Rename all isolate_dependency_* to files.

chrome/telemetry.isolate

Index: chrome/telemetry.isolate
diff --git a/chrome/telemetry.isolate b/chrome/telemetry.isolate
index 05a00a9ef0bf7d46402c47854baaa2208ed4b94b..0fb220b9d3202d1255dc527d182d29076eb9984e 100644
--- a/chrome/telemetry.isolate
+++ b/chrome/telemetry.isolate
@@ -19,20 +19,18 @@
       # Note that the dependency on ../build/android/ was made more
       # precise to ../build/android/pylib/.
       'variables': {
-        'isolate_dependency_tracked': [
+        'files': [
+          '../build/android/pylib/',
+          '../build/util/',
           '../third_party/WebKit/PerformanceTests/resources/jquery.tablesorter.min.js',
           '../third_party/WebKit/PerformanceTests/resources/statistics.js',
+          '../third_party/android_testrunner/',
           '../third_party/flot/jquery.flot.min.js',
-          '../tools/perf/unit-info.json',
-          '<(PRODUCT_DIR)/bitmaptools<(EXECUTABLE_SUFFIX)',
-        ],
-        'isolate_dependency_untracked': [
-          '../build/android/pylib/',
-          '../build/util/',
+          '../third_party/webpagereplay/',
           '../tools/crx_id/',
+          '../tools/perf/unit-info.json',
           '../tools/telemetry/',
-          '../third_party/android_testrunner/',
-          '../third_party/webpagereplay/',
+          '<(PRODUCT_DIR)/bitmaptools<(EXECUTABLE_SUFFIX)',
         ],
       },
     }],