Rename all isolate_dependency_* to files.

content/content_gl_tests.isolate

Index: content/content_gl_tests.isolate
diff --git a/content/content_gl_tests.isolate b/content/content_gl_tests.isolate
index 106dfb71aaf745f9c4c8f16c3e6c33ae5207200b..d5ff6d7befd9f306e5bfc03519a5ea2320d68051 100644
--- a/content/content_gl_tests.isolate
+++ b/content/content_gl_tests.isolate
@@ -8,7 +8,7 @@
         'command': [
           '<(PRODUCT_DIR)/content_gl_tests<(EXECUTABLE_SUFFIX)',
         ],
-        'isolate_dependency_tracked': [
+        'files': [
           '<(PRODUCT_DIR)/content_gl_tests<(EXECUTABLE_SUFFIX)',
         ],
       },
@@ -18,7 +18,7 @@
     # errors. Should investigate further.
     ['OS=="linux" or OS=="win"', {
       'variables': {
-        'isolate_dependency_tracked': [
+        'files': [
           '<(PRODUCT_DIR)/content_resources.pak',
           '<(PRODUCT_DIR)/ui_test.pak',
         ],
@@ -26,21 +26,21 @@
     }],
     ['OS=="linux"', {
       'variables': {
-        'isolate_dependency_tracked': [
+        'files': [
           '<(PRODUCT_DIR)/libffmpegsumo.so',
         ],
       },
     }],
     ['OS=="mac"', {
       'variables': {
-        'isolate_dependency_tracked': [
+        'files': [
           '<(PRODUCT_DIR)/ffmpegsumo.so',
         ],
       },
     }],
     ['OS=="win"', {
       'variables': {
-        'isolate_dependency_tracked': [
+        'files': [
           '<(PRODUCT_DIR)/d3dcompiler_46.dll',
           '<(PRODUCT_DIR)/libEGL.dll',
           '<(PRODUCT_DIR)/libGLESv2.dll',