DevTools: Align combobox width in memory panel.

BUG=690825

Change-Id: I6c4d4bc7dfe074d5a7b1a63a1ce527bc074ca506
Reviewed-on: https://chromium-review.googlesource.com/809647Reviewed-by: Andrey Kosyakov <caseq@chromium.org>
Commit-Queue: Andrey Kosyakov <caseq@chromium.org>
Cr-Commit-Position: refs/heads/master@{#521988}

third_party/WebKit/Source/devtools/front_end/profiler/profilesPanel.css

@@ -195,11 +195,6 @@ body.inactive .profile-launcher-view-content button.running:not(.toolbar-item) {
     margin: 0 0 0 10px !important;
 }
 
-.js_profiler.panel select.chrome-select,
-.heap_profiler.panel select.chrome-select {
-    width: 150px;
-}
-
 .profile-launcher-button {
     margin-top: 10px;
     margin-right: 8px;