re-land r254088 (fixed windows compile issue)

General perf tests that measure time to load libraries.

Added tests to measure time to load CDM libraries.

BUG=337674,337674

Review URL: https://codereview.chromium.org/184733004

git-svn-id: http://src.chromium.org/svn/trunk/src/build@254802 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

all.gyp

@@ -477,6 +477,7 @@
           'dependencies': [
             '../cc/cc_tests.gyp:cc_perftests',
             '../chrome/chrome.gyp:chrome',
+            '../chrome/chrome.gyp:load_library_perf_tests',
             '../chrome/chrome.gyp:performance_browser_tests',
             '../chrome/chrome.gyp:performance_ui_tests',
             '../chrome/chrome.gyp:sync_performance_tests',