A number of poorly written IE BHO's crash IE if ChromeFrame is the currently ...

chrome_frame/utils.cc

 // Copyright (c) 2010 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 "chrome_frame/utils.h"
 
 #include <htiframe.h>
 #include <mshtml.h>
 #include <shlobj.h>
 
@@ skipping 21 matching lines @@
 #include "chrome_frame/html_utils.h"
 #include "chrome_frame/navigation_constraints.h"
 #include "chrome_frame/policy_settings.h"
 #include "chrome_frame/simple_resource_loader.h"
 #include "googleurl/src/gurl.h"
 #include "googleurl/src/url_canon.h"
 #include "grit/chromium_strings.h"
 #include "net/base/escape.h"
 #include "net/http/http_util.h"
 
+#include "chrome_tab.h"  // NOLINT
+
 using base::win::RegKey;
 using base::win::ScopedComPtr;
 
 // Note that these values are all lower case and are compared to
 // lower-case-transformed values.
 const wchar_t kMetaTag[] = L"meta";
 const wchar_t kHttpEquivAttribName[] = L"http-equiv";
 const wchar_t kContentAttribName[] = L"content";
 const wchar_t kXUACompatValue[] = L"x-ua-compatible";
 const wchar_t kBodyTag[] = L"body";
@@ skipping 1524 matching lines @@
     ++url_list;
   }
 }
 
 std::wstring GetCurrentModuleVersion() {
   scoped_ptr<FileVersionInfo> module_version_info(
       FileVersionInfo::CreateFileVersionInfoForCurrentModule());
   DCHECK(module_version_info.get() != NULL);
   return module_version_info->file_version();
 }
+
+bool IsChromeFrameDocument(IWebBrowser2* web_browser) {
+  if (!web_browser)
+    return false;
+
+  ScopedComPtr<IDispatch> doc;
+  web_browser->get_Document(doc.Receive());
+  if (doc) {
+    // Detect if CF is rendering based on whether the document is a
+    // ChromeActiveDocument. Detecting based on hwnd is problematic as
+    // the CF Active Document window may not have been created yet.
+    ScopedComPtr<IChromeFrame> chrome_frame;
+    chrome_frame.QueryFrom(doc);
+    return chrome_frame.get() != NULL;
+  }
+  return false;
+}
+