DevTools: Made id unique across different remote browsers

chrome/test/data/webui/inspect_ui_test.js

Index: chrome/test/data/webui/inspect_ui_test.js
diff --git a/chrome/test/data/webui/inspect_ui_test.js b/chrome/test/data/webui/inspect_ui_test.js
index 0b7d92748f01374feb9d3fd012c66bcb84616fc4..deaa57a0b1235a9ade6c7d2c82bfbc2aba1cf588 100644
--- a/chrome/test/data/webui/inspect_ui_test.js
+++ b/chrome/test/data/webui/inspect_ui_test.js
@@ -66,6 +66,15 @@ function testAdbTargetsListed() {
        chromePages, 'http://www.chromium.org/', '.url');
     expectNotEquals(undefined, chromiumPage);
 
+    var pageById = {};
+    Array.prototype.forEach.call(devices, function (device) {
+      var pages = device.querySelectorAll('.row');
+      Array.prototype.forEach.call(pages, function (page) {
+        expectEquals(undefined, pageById[page.targetId]);
+        pageById[page.targetId] = page;
+      });
+    });
+
     var webView = findByContentSubstring(
        browsers, 'WebView in com.sample.feed (4.0)', '.browser-name');
     expectNotEquals(undefined, webView);