Drop Precise blink builders on chromium.webkit, add corresponding Trusty builders.

scripts/slave/recipes/chromium.expected/chromium_webkit_revision_chromium.json

Index: scripts/slave/recipes/chromium.expected/chromium_webkit_revision_chromium.json
diff --git a/scripts/slave/recipes/chromium.expected/chromium_webkit_revision_chromium.json b/scripts/slave/recipes/chromium.expected/chromium_webkit_revision_chromium.json
index 3db41adf4f655c5faba3e104df8eeab6f1435ea1..8ce93d13586c587a0fb721e30cc4cf80c4fdb998 100644
--- a/scripts/slave/recipes/chromium.expected/chromium_webkit_revision_chromium.json
+++ b/scripts/slave/recipes/chromium.expected/chromium_webkit_revision_chromium.json
@@ -197,7 +197,7 @@
       "--paths",
       "{\"checkout\": \"[SLAVE_BUILD]/src\", \"runit.py\": \"RECIPE_PACKAGE_REPO[build]/scripts/tools/runit.py\", \"runtest.py\": \"RECIPE_PACKAGE_REPO[build]/scripts/slave/runtest.py\"}",
       "--properties",
-      "{\"buildername\": \"WebKit Linux Precise\", \"buildnumber\": 571, \"mastername\": \"chromium.webkit\", \"slavename\": \"TestSlavename\", \"target_platform\": \"linux\"}"
+      "{\"buildername\": \"WebKit Linux Trusty\", \"buildnumber\": 571, \"mastername\": \"chromium.webkit\", \"slavename\": \"TestSlavename\", \"target_platform\": \"linux\"}"
     ],
     "name": "get compile targets for scripts",
     "~followup_annotations": [
@@ -240,7 +240,7 @@
       "-m",
       "chromium.webkit",
       "-b",
-      "WebKit Linux Precise",
+      "WebKit Linux Trusty",
       "--config-file",
       "[SLAVE_BUILD]/src/tools/mb/mb_config.pyl",
       "--goma-dir",
@@ -272,13 +272,13 @@
       "--goma-cache-dir",
       "[GOMA_CACHE]",
       "--buildbot-buildername",
-      "WebKit Linux Precise",
+      "WebKit Linux Trusty",
       "--buildbot-mastername",
       "chromium.webkit",
       "--buildbot-slavename",
       "TestSlavename",
       "--goma-deps-cache-file",
-      "WebKit_Linux_Precise.gomadeps",
+      "WebKit_Linux_Trusty.gomadeps",
       "--compiler",
       "goma",
       "--goma-jsonstatus",
@@ -309,11 +309,11 @@
       "Release",
       "--no-xvfb",
       "--factory-properties",
-      "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"buildername\": \"WebKit Linux Precise\", \"buildnumber\": 571, \"mastername\": \"chromium.webkit\", \"project\": \"chromium\", \"recipe\": \"chromium\", \"revision\": \"3edb4989f8f69c968c0df14cb1c26d21dd19bf1f\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}",
+      "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"buildername\": \"WebKit Linux Trusty\", \"buildnumber\": 571, \"mastername\": \"chromium.webkit\", \"project\": \"chromium\", \"recipe\": \"chromium\", \"revision\": \"3edb4989f8f69c968c0df14cb1c26d21dd19bf1f\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}",
       "--build-properties",
-      "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"buildername\": \"WebKit Linux Precise\", \"buildnumber\": 571, \"mastername\": \"chromium.webkit\", \"project\": \"chromium\", \"recipe\": \"chromium\", \"revision\": \"3edb4989f8f69c968c0df14cb1c26d21dd19bf1f\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}",
+      "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"buildername\": \"WebKit Linux Trusty\", \"buildnumber\": 571, \"mastername\": \"chromium.webkit\", \"project\": \"chromium\", \"recipe\": \"chromium\", \"revision\": \"3edb4989f8f69c968c0df14cb1c26d21dd19bf1f\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}",
       "--step-name=webkit_tests",
-      "--builder-name=WebKit Linux Precise",
+      "--builder-name=WebKit Linux Trusty",
       "--slave-name=TestSlavename",
       "--build-number=571",
       "--run-python-script",
@@ -331,7 +331,7 @@
       "--build-number",
       "571",
       "--builder-name",
-      "WebKit Linux Precise",
+      "WebKit Linux Trusty",
       "--step-name",
       "webkit_tests"
     ],
@@ -355,7 +355,7 @@
       "--build-number",
       "571",
       "--builder-name",
-      "WebKit Linux Precise",
+      "WebKit Linux Trusty",
       "--gs-bucket",
       "gs://chromium-layout-test-archives",
       "--staging-dir",
@@ -366,8 +366,8 @@
     },
     "name": "archive_webkit_tests_results",
     "~followup_annotations": [
-      "@@@STEP_LINK@layout_test_results@https://storage.googleapis.com/chromium-layout-test-archives/WebKit_Linux_Precise/571/layout-test-results/results.html@@@",
-      "@@@STEP_LINK@(zip)@https://storage.googleapis.com/chromium-layout-test-archives/WebKit_Linux_Precise/571/layout-test-results.zip@@@"
+      "@@@STEP_LINK@layout_test_results@https://storage.googleapis.com/chromium-layout-test-archives/WebKit_Linux_Trusty/571/layout-test-results/results.html@@@",
+      "@@@STEP_LINK@(zip)@https://storage.googleapis.com/chromium-layout-test-archives/WebKit_Linux_Trusty/571/layout-test-results.zip@@@"
     ]
   },
   {