Implement webview.captureVisibleRegion()

extensions/browser/guest_view/web_view/web_view_apitest.cc

 // Copyright 2014 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 "extensions/browser/guest_view/web_view/web_view_apitest.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/macros.h"
@@ skipping 718 matching lines @@
 
 IN_PROC_BROWSER_TEST_F(WebViewAPITest, TestWebRequestAPIGoogleProperty) {
   RunTest("testWebRequestAPIGoogleProperty", "web_view/apitest");
 }
 
 // This test verifies that webview.contentWindow works inside an iframe
 IN_PROC_BROWSER_TEST_F(WebViewAPITest, TestWebViewInsideFrame) {
   LaunchApp("web_view/inside_iframe");
 }
 
+IN_PROC_BROWSER_TEST_F(WebViewAPITest, TestCaptureVisibleRegion) {
+  StartTestServer();
+
+  // Launch the app and wait until it's ready to load a test.
+  LaunchApp("web_view/apitest");
+
+  ExtensionTestMessageListener done_listener("TEST_PASSED", false);
+  done_listener.set_failure_message("TEST_FAILED");
+  // Run the test and wait until the guest WebContents is available and has
+  // finished loading.
+  ExtensionTestMessageListener guest_loaded_listener("guest-loaded", false);
+  EXPECT_TRUE(content::ExecuteScript(embedder_web_contents_,
+                                     "runTest('testCaptureVisibleRegion')"));
+
+  content::WebContents* guest_web_contents = GetGuestWebContents();
+  EXPECT_TRUE(guest_web_contents->GetRenderProcessHost()->IsForGuestsOnly());
+  ASSERT_TRUE(guest_loaded_listener.WaitUntilSatisfied());
+
+  // Wait for first frame to render before attempting pixel capture.
+  WaitForFirstFrame(guest_web_contents);

[Fady Samuel, 2016/01/25 16:20:39]

This seems like a broken API if we have to do this.

+
+  EXPECT_TRUE(content::ExecuteScript(embedder_web_contents_,
+                                     "captureVisibleRegionDoCapture()"));
+
+  // It would be nice not to replicate this.
+  ASSERT_TRUE(done_listener.WaitUntilSatisfied());
+
+  StopTestServer();
+}
 
 }  // namespace extensions