Add a "minimum_chrome_version" key to the manifest.

chrome/common/extensions/extension.cc

Index: chrome/common/extensions/extension.cc
diff --git a/chrome/common/extensions/extension.cc b/chrome/common/extensions/extension.cc
index 909708676e93d2433ede8f456d69f52ce2a1ee3c..5dfdf1c1c4328a097ecb843642d485de54fc869c 100644
--- a/chrome/common/extensions/extension.cc
+++ b/chrome/common/extensions/extension.cc
@@ -4,12 +4,14 @@
 
 #include "chrome/common/extensions/extension.h"
 
+#include "app/l10n_util.h"
 #include "app/resource_bundle.h"
 #include "base/base64.h"
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
+#include "base/file_version_info.h"
 #include "base/logging.h"
 #include "base/string_util.h"
 #include "base/stl_util-inl.h"
@@ -24,6 +26,7 @@
 #include "chrome/common/extensions/user_script.h"
 #include "chrome/common/notification_service.h"
 #include "chrome/common/url_constants.h"
+#include "grit/chromium_strings.h"
 #include "webkit/glue/image_decoder.h"
 
 #if defined(OS_WIN)
@@ -757,6 +760,46 @@ bool Extension::InitFromValue(const DictionaryValue& source, bool require_id,
     }
   }
 
+  // Validate minimum Chrome version (if present). We don't need to store this,
+  // since the extension is not valid if it is incorrect.
+  if (source.HasKey(keys::kMinimumChromeVersion)) {
+    std::string minimum_version_string;
+    if (!source.GetString(keys::kMinimumChromeVersion,
+                          &minimum_version_string)) {
+      *error = errors::kInvalidMinimumChromeVersion;
+      return false;
+    }
+
+    scoped_ptr<Version> minimum_version(
+        Version::GetVersionFromString(minimum_version_string));
+    if (!minimum_version.get()) {
+      *error = errors::kInvalidMinimumChromeVersion;
+      return false;
+    }
+
+    scoped_ptr<FileVersionInfo> current_version_info(
+        FileVersionInfo::CreateFileVersionInfoForCurrentModule());
+    if (!current_version_info.get()) {
+      DCHECK(false);
+      return false;
+    }
+
+    scoped_ptr<Version> current_version(
+        Version::GetVersionFromString(current_version_info->file_version()));
+    if (!current_version.get()) {
+      DCHECK(false);
+      return false;
+    }
+
+    if (current_version->CompareTo(*minimum_version) < 0) {
+      *error = ExtensionErrorUtils::FormatErrorMessage(
+          errors::kChromeVersionTooLow,
+          l10n_util::GetStringUTF8(IDS_PRODUCT_NAME),
+          minimum_version_string);
+      return false;
+   }
+  }
+
   // Initialize converted_from_user_script (if present)
   source.GetBoolean(keys::kConvertedFromUserScript,
                     &converted_from_user_script_);