[NaCl SDK] Add pepper_39 to SDK manifest

Also, remove pepper_31 (the current oldest SDK) such
that the total number of SDKs we publish stays constant.

R=binji@chromium.org

Review URL: https://codereview.chromium.org/615573002

Cr-Commit-Position: refs/heads/master@{#297196}

native_client_sdk/src/build_tools/json/naclsdk_manifest2.json

@@ -18,64 +18,6 @@
       "stability": "stable",
       "version": 1
     },
-    {
-      "archives": [
-        {
-          "host_os": "win",
-          "url": "https://storage.googleapis.com/nativeclient-mirror/nacl/nacl_sdk/sdk/${revision}/vs_addin.tgz"
-        }
-      ],
-      "description": "Visual Studio Add-In for building and debugging NaCl applications",
-      "name": "vs_addin",
-      "recommended": "no",
-      "repath": "vs_addin",
-      "revision": 1578,
-      "stability": "dev",
-      "version": 0
-    },
-    {
-      "archives": [
-        {
-          "checksum": {
-            "sha1": "c669f3d3a31bcb389d36889151a3af6354b5343f"
-          },
-          "host_os": "all",
-          "size": 76764755,
-          "url": "https://commondatastorage.googleapis.com/nativeclient-mirror/nacl/nacl_sdk/31.0.1650.57/naclports.tar.bz2"
-        },
-        {
-          "checksum": {
-            "sha1": "bbd7fad94968b7658b7ad9d1c01f831bc61441d0"
-          },
-          "host_os": "linux",
-          "size": 281391254,
-          "url": "https://commondatastorage.googleapis.com/nativeclient-mirror/nacl/nacl_sdk/31.0.1650.57/naclsdk_linux.tar.bz2"
-        },
-        {
-          "checksum": {
-            "sha1": "a0b53095e6a6218ad86dc6b85e76850bb7e51c34"
-          },
-          "host_os": "mac",
-          "size": 248249368,
-          "url": "https://commondatastorage.googleapis.com/nativeclient-mirror/nacl/nacl_sdk/31.0.1650.57/naclsdk_mac.tar.bz2"
-        },
-        {
-          "checksum": {
-            "sha1": "6c2032210ff8ddef5db31308216f3e81a3532a5c"
-          },
-          "host_os": "win",
-          "size": 267524603,
-          "url": "https://commondatastorage.googleapis.com/nativeclient-mirror/nacl/nacl_sdk/31.0.1650.57/naclsdk_win.tar.bz2"
-        }
-      ],
-      "description": "Chrome 31 bundle. Chrome revision: 235101. NaCl revision: 12181",
-      "name": "pepper_31",
-      "recommended": "no",
-      "repath": "pepper_31",
-      "revision": 235101,
-      "stability": "post_stable",
-      "version": 31
-    },
     {
       "archives": [
         {
@@ -212,6 +154,16 @@
       "stability": "post_stable",
       "version": 38
     },
+    {
+      "archives": [],
+      "description": "Chrome 39 bundle, revision xxxxx",
+      "name": "pepper_39",
+      "recommended": "no",
+      "repath": "pepper_39",
+      "revision": 0,
+      "stability": "post_stable",
+      "version": 39
+    },
     {
       "archives": [],
       "description": "Chrome Canary",