Perf test to measure loading CDM library.

chrome/chrome_tests.gypi

Index: chrome/chrome_tests.gypi
diff --git a/chrome/chrome_tests.gypi b/chrome/chrome_tests.gypi
index c3db22264c47512bcc162df61eb39babec079986..ad02f56b65d6100c51a276cca97e3ca613800b53 100644
--- a/chrome/chrome_tests.gypi
+++ b/chrome/chrome_tests.gypi
@@ -2807,6 +2807,24 @@
         '../third_party/webrtc/tools/tools.gyp:rgba_to_i420_converter',
       ],
     },  # target 'webrtc_test_tools'
+    {
+      # Executable to measure time to load libraries.
+      'target_name': 'load_library_perf_test',
+      'type': '<(gtest_target_type)',
+      'dependencies': [
+        '../base/base.gyp:test_support_perf',
+        '../testing/gtest.gyp:gtest',
+        '../testing/perf/perf_test.gyp:*',
+        '../third_party/widevine/cdm/widevine_cdm.gyp:widevine_cdm_version_h',
+      ],
+      'sources': [
+        'browser/load_library_perf_test.cc',
+      ],
+      'include_dirs': [
+        '..',
+        '<(SHARED_INTERMEDIATE_DIR)',
+      ],
+    },  # target 'load_library_perf_test'
   ],
   'conditions': [
     ['OS=="mac"', {