Move GetWebstoreLaunchURL and GetWebstoreItemDetailURLPrefix to extensions/common/extension_urls.h.

chrome/browser/ui/webui/extensions/extension_settings_handler.cc

Index: chrome/browser/ui/webui/extensions/extension_settings_handler.cc
diff --git a/chrome/browser/ui/webui/extensions/extension_settings_handler.cc b/chrome/browser/ui/webui/extensions/extension_settings_handler.cc
index 94834437bd53615b29a57cb431f336b70fdec395..f3966e44b06ee3d227eb5394379be2e27740a52e 100644
--- a/chrome/browser/ui/webui/extensions/extension_settings_handler.cc
+++ b/chrome/browser/ui/webui/extensions/extension_settings_handler.cc
@@ -78,6 +78,7 @@
 #include "extensions/browser/lazy_background_task_queue.h"
 #include "extensions/browser/view_type_utils.h"
 #include "extensions/common/constants.h"
+#include "extensions/common/extension_urls.h"
 #include "extensions/common/manifest_handlers/incognito_info.h"
 #include "grit/browser_resources.h"
 #include "grit/chromium_strings.h"
@@ -93,6 +94,15 @@ using content::WebContents;
 
 namespace extensions {
 
+namespace {
+
+// Returns the URL to the extensions category on the Web Store.
+GURL GetExtensionGalleryURL() {
+  return GURL(GetWebstoreLaunchURL() + "/category/extensions");
+}
+
+}  // namespace
+
 ExtensionPage::ExtensionPage(const GURL& url,
                              int render_process_id,
                              int render_view_id,
@@ -352,12 +362,12 @@ void ExtensionSettingsHandler::GetLocalizedValues(
   source->AddString("extensionSettingsSuggestGallery",
       l10n_util::GetStringFUTF16(IDS_EXTENSIONS_NONE_INSTALLED_SUGGEST_GALLERY,
           ASCIIToUTF16(google_util::AppendGoogleLocaleParam(
-              GURL(extension_urls::GetExtensionGalleryURL())).spec())));
+              GetExtensionGalleryURL()).spec())));
   source->AddString("extensionSettingsGetMoreExtensions",
       l10n_util::GetStringUTF16(IDS_GET_MORE_EXTENSIONS));
   source->AddString("extensionSettingsGetMoreExtensionsUrl",
       ASCIIToUTF16(google_util::AppendGoogleLocaleParam(
-          GURL(extension_urls::GetExtensionGalleryURL())).spec()));
+          GetExtensionGalleryURL()).spec()));
   source->AddString("extensionSettingsExtensionId",
       l10n_util::GetStringUTF16(IDS_EXTENSIONS_ID));
   source->AddString("extensionSettingsExtensionPath",