Basic multi-module support

chrome/common/extensions/extension.h

Index: chrome/common/extensions/extension.h
diff --git a/chrome/common/extensions/extension.h b/chrome/common/extensions/extension.h
index 10b143023e91713896440f3ee62abf76bd1a9949..63da5421ed6574ee74b952ce1519727a105865a7 100644
--- a/chrome/common/extensions/extension.h
+++ b/chrome/common/extensions/extension.h
@@ -113,6 +113,11 @@ class Extension : public base::RefCountedThreadSafe<Extension> {
     std::string mime_type;
   };
 
+  struct ImportInfo {
+    std::string extension_id;
+    std::string min_version;
+  };
+
   // A base class for parsed manifest data that APIs want to store on
   // the extension. Related to base::SupportsUserData, but with an immutable
   // thread-safe interface to match Extension.
@@ -466,6 +471,13 @@ class Extension : public base::RefCountedThreadSafe<Extension> {
   // Theme-related.
   bool is_theme() const;
 
+  static void ParseImportedPath(const std::string& path,
+                                std::string* import_id,
+                                std::string* import_relative_path);
+  static bool IsImportedPath(const std::string& path);
+  bool Imports(const std::string& other_id) const;
+  bool IsExportAllowed(const std::string& relative_path) const;
+
  private:
   friend class base::RefCountedThreadSafe<Extension>;
 
@@ -537,6 +549,7 @@ class Extension : public base::RefCountedThreadSafe<Extension> {
   bool LoadLaunchURL(string16* error);
 
   bool LoadSharedFeatures(string16* error);
+  bool LoadSharedModuleFeatures(string16* error);

[Matt Perry, 2013/04/24 21:22:11]

All the shared module stuff should move to its own file and ManifestHandler.
Take a look at BackgroundInfo for an example of how that's done:
https://code.google.com/p/chromium/codesearch#chromium/src/chrome/common/exte...

   bool LoadDescription(string16* error);
   bool LoadManifestVersion(string16* error);
   bool LoadNaClModules(string16* error);
@@ -604,6 +617,12 @@ class Extension : public base::RefCountedThreadSafe<Extension> {
   // The extension's required / default set of permissions.
   scoped_refptr<const PermissionSet> required_permission_set_;
 
+  // This extension exports the following resources to other extensions.
+  URLPatternSet exported_set_;
+
+  // Optional list of module imports of other extensions.
+  std::vector<ImportInfo> imports_;
+
   // Any warnings that occurred when trying to create/parse the extension.
   std::vector<InstallWarning> install_warnings_;