swarming: wholesale switch remaining tests to run on Swarming.

testing/buildbot/chromium.linux.json

Index: testing/buildbot/chromium.linux.json
diff --git a/testing/buildbot/chromium.linux.json b/testing/buildbot/chromium.linux.json
index 4fff6ed2e87cc882b25d646e60d4f1a955744d06..100bdbb8f8df3a3acd10988c55e0562676927c29 100644
--- a/testing/buildbot/chromium.linux.json
+++ b/testing/buildbot/chromium.linux.json
@@ -815,6 +815,9 @@
   "Blimp Linux (dbg)": {
     "gtest_tests": [
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "blimp_browsertests"
       }
     ]
@@ -840,15 +843,27 @@
         "test": "capture_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "cast_alsa_cma_backend_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "cast_base_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "cast_crash_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "cast_media_unittests"
       },
       {
@@ -859,9 +874,15 @@
           "--no-sandbox",
           "--test-launcher-jobs=1"
         ],
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "cast_shell_browser_test"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "cast_shell_unittests"
       },
       {
@@ -1119,6 +1140,9 @@
         "test": "crypto_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "dbus_unittests"
       },
       {
@@ -1314,6 +1338,9 @@
         "test": "mus_clipboard_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "mus_gpu_unittests"
       },
       {
@@ -1623,6 +1650,9 @@
         "test": "crypto_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "dbus_unittests"
       },
       {
@@ -1656,6 +1686,9 @@
         "test": "extensions_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "filesystem_service_unittests"
       },
       {
@@ -1768,6 +1801,9 @@
         "test": "mus_clipboard_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "mus_gpu_unittests"
       },
       {