Implemented a policy for centralized setting of the --disk-cache-dir flag.

chrome/app/policy/policy_templates.json

Index: chrome/app/policy/policy_templates.json
diff --git a/chrome/app/policy/policy_templates.json b/chrome/app/policy/policy_templates.json
index aaf07ec0123ef8514224d7c41e988a0009738dd2..a3afd76d93cdf3064c783e456cb99be01f59b060 100644
--- a/chrome/app/policy/policy_templates.json
+++ b/chrome/app/policy/policy_templates.json
@@ -94,7 +94,7 @@
 #   persistent IDs for all fields (but not for groups!) are needed. These are
 #   specified by the 'id' keys of each policy. NEVER CHANGE EXISTING IDs,
 #   because doing so would break the deployed wire format!
-#   For your editing convenience: highest ID currently used: 87
+#   For your editing convenience: highest ID currently used: 88
 #
 # Placeholders:
 #   The following placeholder strings are automatically substituted:
@@ -487,6 +487,19 @@
       'label': '''Set user data directory''',
     },
     {
+      'name': 'DiskCacheDir',
+      'type': 'string',
+      'supported_on': ['chrome.*:13-'],
+      'features': {'dynamic_refresh': 0},
+      'example_value': '${user_home}/Chrome_cache',
+      'id': 88,
+      'caption': '''Set disk cache directory''',
+      'desc': '''Configures the directory that <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> will use for storing cached files on the disk.
+
+      If you set this policy, <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> will use the provided directory regardless whether the user has specified the '--disk-cache-dir' flag or not.''',
+      'label': '''Set disk cache directory''',
+    },
+    {
       'name': 'DownloadDirectory',
       'type': 'string',
       'supported_on': ['chrome.*:11-'],