Reimplement min-width: auto

Source/devtools/front_end/inspectorCommon.css

Index: Source/devtools/front_end/inspectorCommon.css
diff --git a/Source/devtools/front_end/inspectorCommon.css b/Source/devtools/front_end/inspectorCommon.css
index bd103bea3ca307b69e3568e347009fc414fd1407..ec4e1fe97c8aba666d32abdf37dfb41b2ddbfe54 100644
--- a/Source/devtools/front_end/inspectorCommon.css
+++ b/Source/devtools/front_end/inspectorCommon.css
@@ -1,3 +1,11 @@
+body /deep/ * {
+    /* This is required for correct sizing of flex items because we rely
+     * on an old version of the flexbox spec.
+     * Longer-term we should remove this, see crbug.com/473625 */
+    min-width: 0;
+    min-height: 0;
+}
+
 html {
     height: 100%;
     overflow: hidden;