Add a "minimum_chrome_version" key to the manifest.

chrome/common/extensions/extension_constants.cc

 // Copyright (c) 2009 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/common/extensions/extension_constants.h"
 
 namespace extension_manifest_keys {
 
 const wchar_t* kAllFrames = L"all_frames";
 const wchar_t* kBackground = L"background_page";
 const wchar_t* kBrowserAction = L"browser_action";
 const wchar_t* kChromeURLOverrides = L"chrome_url_overrides";
 const wchar_t* kContentScripts = L"content_scripts";
 const wchar_t* kConvertedFromUserScript = L"converted_from_user_script";
 const wchar_t* kCss = L"css";
 const wchar_t* kCurrentLocale = L"current_locale";
 const wchar_t* kDefaultLocale = L"default_locale";
 const wchar_t* kDescription = L"description";
 const wchar_t* kIcons = L"icons";
 const wchar_t* kJs = L"js";
 const wchar_t* kMatches = L"matches";
+const wchar_t* kMinimumChromeVersion = L"minimum_chrome_version";
 const wchar_t* kIncludeGlobs = L"include_globs";
 const wchar_t* kExcludeGlobs = L"exclude_globs";
 const wchar_t* kName = L"name";
 const wchar_t* kPageActionId = L"id";
 const wchar_t* kPageAction = L"page_action";
 const wchar_t* kPageActions = L"page_actions";
 const wchar_t* kPageActionIcons = L"icons";
 const wchar_t* kPageActionDefaultIcon = L"default_icon";
 const wchar_t* kPageActionDefaultTitle = L"default_title";
 const wchar_t* kPageActionPopup = L"popup";
@@ skipping 28 matching lines @@
 const char* kRunAtDocumentIdle = "document_idle";
 const char* kPageActionTypeTab = "tab";
 const char* kPageActionTypePermanent = "permanent";
 }  // namespace extension_manifest_values
 
 // Extension-related error messages. Some of these are simple patterns, where a
 // '*' is replaced at runtime with a specific value. This is used instead of
 // printf because we want to unit test them and scanf is hard to make
 // cross-platform.
 namespace extension_manifest_errors {
+const char* kChromeVersionTooLow =
+    "This extension requires * version * or greater.";
 const char* kInvalidAllFrames =
     "Invalid value for 'content_scripts[*].all_frames'.";
 const char* kInvalidBrowserAction =
     "Invalid value for 'browser_action'.";
 const char* kInvalidChromeURLOverrides =
     "Invalid value for 'chrome_url_overrides'.";
 const char* kInvalidContentScript =
     "Invalid value for 'content_scripts[*]'.";
 const char* kInvalidContentScriptsList =
     "Invalid value for 'content_scripts'.";
 const char* kInvalidCss =
     "Invalid value for 'content_scripts[*].css[*]'.";
 const char* kInvalidCssList =
-    "Required value 'content_scripts[*].css is invalid.";
+    "Required value 'content_scripts[*].css' is invalid.";
 const char* kInvalidDescription =
     "Invalid value for 'description'.";
 const char* kInvalidGlobList =
     "Invalid value for 'content_scripts[*].*'.";
 const char* kInvalidGlob =
     "Invalid value for 'content_scripts[*].*[*]'.";
 const char* kInvalidIcons =
     "Invalid value for 'icons'.";
 const char* kInvalidIconPath =
     "Invalid value for 'icons[\"*\"]'.";
 const char* kInvalidJs =
     "Invalid value for 'content_scripts[*].js[*]'.";
 const char* kInvalidJsList =
-    "Required value 'content_scripts[*].js is invalid.";
+    "Required value 'content_scripts[*].js' is invalid.";
 const char* kInvalidKey =
     "Value 'key' is missing or invalid.";
 const char* kInvalidManifest =
     "Manifest file is invalid.";
 const char* kInvalidMatchCount =
-    "Invalid value for 'content_scripts[*].matches. There must be at least one "
-    "match specified.";
+    "Invalid value for 'content_scripts[*].matches'. There must be at least"
+    "one match specified.";
 const char* kInvalidMatch =
     "Invalid value for 'content_scripts[*].matches[*]'.";
 const char* kInvalidMatches =
     "Required value 'content_scripts[*].matches' is missing or invalid.";
+const char* kInvalidMinimumChromeVersion =
+    "Invalid value for 'minimum_chrome_version'.";
 const char* kInvalidName =
     "Required value 'name' is missing or invalid.";
 const char* kInvalidPageAction =
     "Invalid value for 'page_action'.";
 const char* kInvalidPageActionName =
     "Invalid value for 'page_action.name'.";
 const char* kInvalidPageActionIconPath =
     "Invalid value for 'page_action.default_icon'.";
 const char* kInvalidPageActionsList =
     "Invalid value for 'page_actions'.";
@@ skipping 81 matching lines @@
     "Invalid value for 'options_page'.";
 }  // namespace extension_manifest_errors
 
 namespace extension_urls {
 const char* kGalleryBrowsePrefix = "https://chrome.google.com/extensions";
 const char* kGalleryDownloadPrefix =
     "https://clients2.googleusercontent.com/crx/download";
 const char* kMiniGalleryBrowsePrefix = "https://tools.google.com/chrome/";
 const char* kMiniGalleryDownloadPrefix = "https://dl-ssl.google.com/chrome/";
 }