On Linux, move the passing of filedescriptors to a dedicated socketpair().

chrome/tools/test/reference_build/chrome_linux/resources/inspector/devtools.css

Index: chrome/tools/test/reference_build/chrome_linux/resources/inspector/devtools.css
diff --git a/chrome/tools/test/reference_build/chrome_linux/resources/inspector/devtools.css b/chrome/tools/test/reference_build/chrome_linux/resources/inspector/devtools.css
new file mode 100644
index 0000000000000000000000000000000000000000..eb649c5656d05cdb353c8e6cd59d86a9276e5e23
--- /dev/null
+++ b/chrome/tools/test/reference_build/chrome_linux/resources/inspector/devtools.css
@@ -0,0 +1,99 @@
+#scripts-files option.injected {
+    color: rgb(70, 134, 240);
+}
+
+.data-grid table {
+    line-height: 120%;
+}
+
+body.attached #toolbar {
+    height: 34px;
+    border-top: 1px solid rgb(100, 100, 100);
+    cursor: default; /* overriden */
+    padding-left: 0;
+}
+
+
+/* Chrome theme overrides */
+#toolbar {
+    background-image: -webkit-gradient(linear, left top, left bottom, from(rgb(242, 247, 253)), to(rgb(223, 234, 248)));
+}
+
+
+/* Heap Profiler Styles */
+
+#heap-snapshot-views {
+    position: absolute;
+    top: 0;
+    right: 0;
+    left: 200px;
+    bottom: 0;
+}
+
+#heap-snapshot-status-bar-items {
+    position: absolute;
+    top: 0;
+    bottom: 0;
+    left: 200px;
+    overflow: hidden;
+    border-left: 1px solid rgb(184, 184, 184);
+    margin-left: -1px;
+}
+
+.heap-snapshot-status-bar-item .glyph {
+    -webkit-mask-image: url(Images/focusButtonGlyph.png);
+}
+
+.heap-snapshot-sidebar-tree-item .icon {
+    content: url(Images/profileIcon.png);
+}
+
+.heap-snapshot-sidebar-tree-item.small .icon {
+    content: url(Images/profileSmallIcon.png);
+}
+
+.heap-snapshot-view {
+    display: none;
+    overflow: hidden;
+    position: absolute;
+    top: 0;
+    left: 0;
+    right: 0;
+    bottom: 0;
+}
+
+.heap-snapshot-view.visible {
+    display: block;
+}
+
+.heap-snapshot-view .data-grid {
+    border: none;
+    max-height: 100%;
+    position: absolute;
+    left: 0;
+    right: 0;
+    top: 0;
+    bottom: 93px;
+}
+
+#heap-snapshot-summary {
+    position: absolute;
+    padding-top: 20px;
+    bottom: 0;
+    left: 0;
+    right: 0;
+    height: 93px;
+    margin-left: -1px;
+    border-left: 1px solid rgb(102, 102, 102);
+    background-color: rgb(101, 111, 130);
+    background-image: -webkit-gradient(linear, left top, left bottom, from(rgba(0, 0, 0, 0.5)), to(rgba(0, 0, 0, 0)));
+    background-repeat: repeat-x;
+    background-position: top;
+    text-align: center;
+    text-shadow: black 0 1px 1px;
+    white-space: nowrap;
+    color: white;
+    -webkit-background-size: 1px 6px;
+    -webkit-background-origin: padding;
+    -webkit-background-clip: padding;
+}