Move kExtensionScheme from content to chrome

content/common/url_constants.cc

 // Copyright (c) 2011 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/common/url_constants.h"
 
-#include <stdio.h>
+#include "base/string_util.h"
+#include "googleurl/src/url_util.h"
+
+namespace {
+const char* kDefaultSavableSchemes[] = {
+  chrome::kHttpScheme,
+  chrome::kHttpsScheme,
+  chrome::kFileScheme,
+  chrome::kFtpScheme,
+  chrome::kChromeDevToolsScheme,
+  chrome::kChromeUIScheme,
+  NULL
+};
+char** g_savable_schemes = const_cast<char**>(kDefaultSavableSchemes);
+}  // namespace
 
 namespace chrome {
 
-const char* kSavableSchemes[] = {
-  kHttpScheme,
-  kHttpsScheme,
-  kFileScheme,
-  kFtpScheme,
-  kExtensionScheme,
-  kChromeDevToolsScheme,
-  kChromeUIScheme,
-  NULL
-};
-
 const char kAboutScheme[] = "about";
 const char kBlobScheme[] = "blob";
 
 // Before adding new chrome schemes please check with security@chromium.org.
 // There are security implications associated with introducing new schemes.
 const char kChromeDevToolsScheme[] = "chrome-devtools";
 const char kChromeInternalScheme[] = "chrome-internal";
 const char kChromeUIScheme[] = "chrome";
 const char kDataScheme[] = "data";
-const char kExtensionScheme[] = "chrome-extension";
 const char kFileScheme[] = "file";
 const char kFileSystemScheme[] = "filesystem";
 const char kFtpScheme[] = "ftp";
 const char kHttpScheme[] = "http";
 const char kHttpsScheme[] = "https";
 const char kJavaScriptScheme[] = "javascript";
 const char kMailToScheme[] = "mailto";
 const char kMetadataScheme[] = "metadata";
 const char kViewSourceScheme[] = "view-source";
 
 const char kStandardSchemeSeparator[] = "://";
 
 const char kAboutBlankURL[] = "about:blank";
 const char kAboutCrashURL[] = "about:crash";
 
 const char kUnreachableWebDataURL[] = "chrome://chromewebdata/";
 
+const char** GetSavableSchemes() {
+  return const_cast<const char**>(g_savable_schemes);
+}
+
+void RegisterContentSchemes(const char** additional_savable_schemes) {
+  // Don't need "chrome-internal" which was used in old versions of Chrome for
+  // the new tab page.
+  url_util::AddStandardScheme(kChromeDevToolsScheme);
+  url_util::AddStandardScheme(kChromeUIScheme);
+  url_util::AddStandardScheme(kMetadataScheme);
+
+  // Prevent future modification of the standard schemes list. This is to
+  // prevent accidental creation of data races in the program. AddStandardScheme
+  // isn't threadsafe so must be called when GURL isn't used on any other
+  // thread. This is really easy to mess up, so we say that all calls to
+  // AddStandardScheme in Chrome must be inside this function.
+  url_util::LockStandardSchemes();
+
+  // We rely on the above lock to protect this part from being invoked twice.
+  if (additional_savable_schemes) {
+    int schemes = 0;
+    while (additional_savable_schemes[++schemes]);
+    // The array, and the copied schemes won't be freed, but will remain
+    // reachable.
+    g_savable_schemes = new char*[schemes + arraysize(kDefaultSavableSchemes)];
+    memcpy(g_savable_schemes,
+           kDefaultSavableSchemes,
+           arraysize(kDefaultSavableSchemes) * sizeof(char*));
+    for (int i = 0; i < schemes; ++i) {
+      g_savable_schemes[arraysize(kDefaultSavableSchemes) + i - 1] =
+          base::strdup(additional_savable_schemes[i]);
+    }
+    g_savable_schemes[arraysize(kDefaultSavableSchemes) + schemes - 1] = 0;
+  }
+}
+
 }  // namespace chrome