Propagate window coordinates to out-of-process iframes renderers.

content/browser/site_per_process_browsertest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/site_per_process_browsertest.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 5238 matching lines @@
   observer->Wait();
 
   // Force the renderer to generate a new frame.
   EXPECT_TRUE(ExecuteScript(shell()->web_contents(),
                             "document.body.style.background = 'black'"));
 
   // Waits for the next frame.
   observer->Wait();
 }
 
+IN_PROC_BROWSER_TEST_F(SitePerProcessBrowserTest, ScreenCoordinates) {
+  GURL main_url(embedded_test_server()->GetURL(
+      "a.com", "/cross_site_iframe_factory.html?a(b)"));
+  NavigateToURL(shell(), main_url);
+
+  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
+                            ->GetFrameTree()
+                            ->root();
+  FrameTreeNode* child = root->child_at(0);
+
+  const char* properties[] = {"screenX", "screenY", "outerWidth",
+                              "outerHeight"};
+
+  for (const char* property : properties) {
+    std::string script = "window.domAutomationController.send(window.";
+    script += property;
+    script += ");";
+    int root_value = 1;

[nasko, 2016/02/12 18:14:08]

Are the tests always positioned the same way? I'm wary of this becoming a flaky
test. Can we explicitly position the window first, then test the expectations?

[lfg, 2016/03/02 18:29:08]

This shouldn't be an issue. The important point of the test is testing that
window.{screenX,screenY,outerWidget,outerHeight} all return the same values
regardless if you are in the iframe or the top level page.

+    int child_value = 2;
+    EXPECT_TRUE(ExecuteScriptAndExtractInt(root->current_frame_host(),
+                                           script.c_str(), &root_value));
+
+    EXPECT_TRUE(ExecuteScriptAndExtractInt(child->current_frame_host(),
+                                           script.c_str(), &child_value));
+
+    EXPECT_EQ(root_value, child_value);
+  }
+}
+
 }  // namespace content