Support an --install-from-webstore command line switch

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index e63475d0f6f7d00749a7080cf7419a216a90474b..c174f3c43a6eab91fd811253d9a2c8db53c27e0b 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -91,6 +91,9 @@ const char kAppsGalleryURL[]                = "apps-gallery-url";
 // The update url used by gallery/webstore extensions.
 const char kAppsGalleryUpdateURL[]          = "apps-gallery-update-url";
 
+// TODO(asargent) - remove this flag and change uses of it to instead use
+// kInstallFromWebstore.
+//
 // Specifies the URL of an application manifest to retrieve. The user will be
 // prompted for consent and the application retrieved/installed if consented.
 const char kAppsInstallFromManifestURL[]    = "apps-install-from-manifest-url";
@@ -790,6 +793,10 @@ const char kImportFromFile[]                = "import-from-file";
 // Causes the browser to launch directly in incognito mode.
 const char kIncognito[]                     = "incognito";
 
+// Causes Chrome to attempt to get metadata from the webstore for the
+// app/extension ID given, and then prompt the user to download and install it.
+const char kInstallFromWebstore[]    = "install-from-webstore";
+
 // URL to use for instant. If specified this overrides the url from the
 // TemplateURL.
 const char kInstantURL[]                    = "instant-url";