Add setting to isolate zoom changes by default.

content/browser/web_contents/web_contents_impl_unittest.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 <stdint.h>
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/macros.h"
@@ skipping 35 matching lines @@
 #include "content/public/test/mock_render_process_host.h"
 #include "content/public/test/test_browser_context.h"
 #include "content/public/test/test_utils.h"
 #include "content/test/test_content_browser_client.h"
 #include "content/test/test_content_client.h"
 #include "content/test/test_render_frame_host.h"
 #include "content/test/test_render_view_host.h"
 #include "content/test/test_web_contents.h"
 #include "net/test/cert_test_util.h"
 #include "net/test/test_data_directory.h"
+#include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "url/url_constants.h"
 
 namespace content {
 namespace {
 
 class TestInterstitialPage;
 
 class TestInterstitialPageDelegate : public InterstitialPageDelegate {
@@ skipping 3373 matching lines @@
 
   // An automatic navigation.
   main_test_rfh()->SendNavigateWithModificationCallback(
       0, true, GURL(url::kAboutBlankURL), base::Bind(SetAsNonUserGesture));
 
   EXPECT_EQ(1u, dialog_manager.reset_count());
 
   contents()->SetJavaScriptDialogManagerForTesting(nullptr);
 }
 
+namespace {
+
+class MockWebContentsObserver : public WebContentsObserver {
+ public:
+   explicit MockWebContentsObserver(WebContents* web_contents)
+     : WebContentsObserver(web_contents) {}
+   MOCK_METHOD2(
+       WebContentsReplaced,
+       void(WebContents* old_web_contents, WebContents* new_web_contents));
+};
+
+}  // namespace
+
+// Makes sure that when a WebContents is replaced, it notifies its observers.
+TEST_F(WebContentsImplTest, NotifiesOnReplacement) {
+  WebContents* other_contents = contents()->Clone();
+
+  MockWebContentsObserver observer(contents());
+  EXPECT_CALL(observer, WebContentsReplaced(contents(), other_contents));
+  contents()->OnReplaced(other_contents);
+
+  delete other_contents;
+}
+
 }  // namespace content