Implement gallery install API

chrome/browser/extensions/crx_installer.h

Index: chrome/browser/extensions/crx_installer.h
diff --git a/chrome/browser/extensions/crx_installer.h b/chrome/browser/extensions/crx_installer.h
index ce9b8e6a8a47aa255877ed7460116bd7ef552e89..7613d93fdaeb7d20a7a5ae6065790f98c736ba52 100644
--- a/chrome/browser/extensions/crx_installer.h
+++ b/chrome/browser/extensions/crx_installer.h
@@ -44,6 +44,18 @@ class CrxInstaller
     : public SandboxedExtensionUnpackerClient,
       public ExtensionInstallUI::Delegate {
  public:
+
+  // This is pretty lame, but given the difficulty of connecting a particular
+  // ExtensionFunction to a resulting download in the download manager, it's
+  // currently necessary. This is the |id| of an extension to be installed
+  // *by the web store only* which should not get the permissions install
+  // prompt.
+  // crbug.com/54916
+  static void SetWhitelistedInstallId(const std::string& id);
+
+  // Returns whether |id| was found and removed (was whitelisted).
+  static bool ClearWhitelistedInstallId(const std::string& id);
+
   // Constructor.  Extensions will be unpacked to |install_directory|.
   // Extension objects will be sent to |frontend|, and any UI will be shown
   // via |client|. For silent install, pass NULL for |client|.
@@ -83,6 +95,9 @@ class CrxInstaller
     allow_privilege_increase_ = val;
   }
 
+  bool allow_silent_install() const { return allow_silent_install_; }
+  void set_allow_silent_install(bool val) { allow_silent_install_ = val; }
+
   bool limit_web_extent_to_download_host() const {
     return limit_web_extent_to_download_host_;
   }
@@ -203,6 +218,13 @@ class CrxInstaller
   // Used to trigger extra checks before installing.
   bool apps_require_extension_mime_type_;
 
+  // Allows for the possibility of a normal install (one in which a |client|
+  // is provided in the ctor) to procede without showing the permissions prompt
+  // dialog. Note that this will only take place if |allow_silent_install_|
+  // is true AND the unpacked id of the extension is whitelisted with
+  // SetWhitelistedInstallId().
+  bool allow_silent_install_;
+
   // The value of the content type header sent with the CRX.
   // Ignorred unless |require_extension_mime_type_| is true.
   std::string original_mime_type_;