6 files changed, 70 insertions, 2 deletions
diff --git a/chrome/browser/web_applications/web_app.cc b/chrome/browser/web_applications/web_app.cc
index e7558e5..654299e 100644
--- a/chrome/browser/web_applications/web_app.cc
+++ b/chrome/browser/web_applications/web_app.cc
@@ -38,6 +38,16 @@ void DeleteShortcutsOnFileThread(
       shortcut_data_dir, shortcut_info);
 }
 
+void UpdateShortcutsOnFileThread(
+    const ShellIntegration::ShortcutInfo& shortcut_info) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
+
+  FilePath shortcut_data_dir = web_app::GetWebAppDataDirectory(
+      shortcut_info.profile_path, shortcut_info.extension_id, GURL());
+  return web_app::internals::UpdatePlatformShortcuts(
+      shortcut_data_dir, shortcut_info);
+}
+
 }  // namespace
 
 namespace web_app {
@@ -148,6 +158,15 @@ void DeleteAllShortcuts(const ShellIntegration::ShortcutInfo& shortcut_info) {
       base::Bind(&DeleteShortcutsOnFileThread, shortcut_info));
 }
 
+void UpdateAllShortcuts(const ShellIntegration::ShortcutInfo& shortcut_info) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  BrowserThread::PostTask(
+      BrowserThread::FILE,
+      FROM_HERE,
+      base::Bind(&UpdateShortcutsOnFileThread, shortcut_info));
+}
+
 bool CreateShortcutsOnFileThread(
     const ShellIntegration::ShortcutInfo& shortcut_info) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
diff --git a/chrome/browser/web_applications/web_app.h b/chrome/browser/web_applications/web_app.h
index 2322504..56b6612 100644
--- a/chrome/browser/web_applications/web_app.h
+++ b/chrome/browser/web_applications/web_app.h
@@ -47,13 +47,17 @@ std::string GenerateApplicationNameFromExtensionId(const std::string& id);
 std::string GetExtensionIdFromApplicationName(const std::string& app_name);
 
 // Creates shortcuts for web application based on given shortcut data.
-// |shortcut_info| contains information about the shortcut to create.
+// |shortcut_info| contains information about the shortcuts to create.
 void CreateShortcuts(const ShellIntegration::ShortcutInfo& shortcut_info);
 
 // Delete all the shortcuts that have been created for the given
 // |shortcut_data| in the profile with |profile_path|.
 void DeleteAllShortcuts(const ShellIntegration::ShortcutInfo& shortcut_info);
 
+// Updates shortcuts for web application based on given shortcut data.
+// |shortcut_info| contains information about the shortcuts to update.
+void UpdateAllShortcuts(const ShellIntegration::ShortcutInfo& shortcut_info);
+
 // Creates a shortcut. Must be called on the file thread. This is used to
 // implement CreateShortcuts() above, and can also be used directly from the
 // file thread. |shortcut_info| contains info about the shortcut to create.
@@ -95,11 +99,18 @@ bool CreatePlatformShortcuts(
 
 // Delete all the shortcuts we have added for this extension. This is the
 // platform specific implementation of the DeleteAllShortcuts function, and
-// is executed on the FILE thread..
+// is executed on the FILE thread.
 void DeletePlatformShortcuts(
     const FilePath& shortcut_data_path,
     const ShellIntegration::ShortcutInfo& shortcut_info);
 
+// Updates all the shortcuts we have added for this extension. This is the
+// platform specific implementation of the UpdateAllShortcuts function, and
+// is executed on the FILE thread.
+void UpdatePlatformShortcuts(
+    const FilePath& shortcut_data_path,
+    const ShellIntegration::ShortcutInfo& shortcut_info);
+
 // Sanitizes |name| and returns a version of it that is safe to use as an
 // on-disk file name .
 FilePath GetSanitizedFileName(const string16& name);
diff --git a/chrome/browser/web_applications/web_app_android.cc b/chrome/browser/web_applications/web_app_android.cc
index b5f00cf..2008ece 100644
--- a/chrome/browser/web_applications/web_app_android.cc
+++ b/chrome/browser/web_applications/web_app_android.cc
@@ -17,5 +17,9 @@ void DeletePlatformShortcuts(
     const FilePath& web_app_path,
     const ShellIntegration::ShortcutInfo& shortcut_info) {}
 
+void UpdatePlatformShortcuts(
+    const FilePath& web_app_path,
+    const ShellIntegration::ShortcutInfo& shortcut_info) {}
+
 }  // namespace internals
 }  // namespace web_app
diff --git a/chrome/browser/web_applications/web_app_linux.cc b/chrome/browser/web_applications/web_app_linux.cc
index c66968d..18ac835 100644
--- a/chrome/browser/web_applications/web_app_linux.cc
+++ b/chrome/browser/web_applications/web_app_linux.cc
@@ -10,6 +10,7 @@
 #include "content/public/browser/browser_thread.h"
 
 namespace web_app {
+
 namespace internals {
 
 bool CreatePlatformShortcuts(
@@ -35,5 +36,12 @@ void DeletePlatformShortcuts(
       shortcut_info.extension_id);
 }
 
+void UpdatePlatformShortcuts(
+    const FilePath& web_app_path,
+    const ShellIntegration::ShortcutInfo& shortcut_info) {
+  // TODO(benwells): Implement this.
+}
+
 }  // namespace internals
+
 }  // namespace web_app
diff --git a/chrome/browser/web_applications/web_app_mac.mm b/chrome/browser/web_applications/web_app_mac.mm
index f373076..2ab8560 100644
--- a/chrome/browser/web_applications/web_app_mac.mm
+++ b/chrome/browser/web_applications/web_app_mac.mm
@@ -250,6 +250,7 @@ void WebAppShortcutCreator::RevealGeneratedBundleInFinder(
 }  // namespace
 
 namespace web_app {
+
 namespace internals {
 
 bool CreatePlatformShortcuts(
@@ -269,5 +270,13 @@ void DeletePlatformShortcuts(
   // mac.
 }
 
+void UpdatePlatformShortcuts(
+    const FilePath& web_app_path,
+    const ShellIntegration::ShortcutInfo& shortcut_info) {
+  // TODO(benwells): Implement this when shortcuts / weblings are enabled on
+  // mac.
+}
+
 }  // namespace internals
+
 }  // namespace web_app
diff --git a/chrome/browser/web_applications/web_app_win.cc b/chrome/browser/web_applications/web_app_win.cc
index d1d5634..f1df116 100644
--- a/chrome/browser/web_applications/web_app_win.cc
+++ b/chrome/browser/web_applications/web_app_win.cc
@@ -296,6 +296,23 @@ bool CreatePlatformShortcuts(
   return success;
 }
 
+void UpdatePlatformShortcuts(
+    const FilePath& web_app_path,
+    const ShellIntegration::ShortcutInfo& shortcut_info) {
+  // Generates file name to use with persisted ico and shortcut file.
+  FilePath file_name =
+      web_app::internals::GetSanitizedFileName(shortcut_info.title);
+
+  // If an icon file exists, and is out of date, replace it with the new icon
+  // and let the shell know the icon has been modified.
+  FilePath icon_file = web_app_path.Append(file_name).ReplaceExtension(
+      FILE_PATH_LITERAL(".ico"));
+  if (file_util::PathExists(icon_file)) {
+    web_app::internals::CheckAndSaveIcon(icon_file,
+        *shortcut_info.favicon.ToSkBitmap());
+  }
+}
+
 void DeletePlatformShortcuts(
     const FilePath& web_app_path,
     const ShellIntegration::ShortcutInfo& shortcut_info) {