Do not show the install prompt for themes.

chrome/browser/extensions/extension_webstore_private_apitest.cc

Index: chrome/browser/extensions/extension_webstore_private_apitest.cc
diff --git a/chrome/browser/extensions/extension_webstore_private_apitest.cc b/chrome/browser/extensions/extension_webstore_private_apitest.cc
index 75b5104eb8dec8b66f8e20e0f4344d27f33dfae3..6115d10bf5d513ae6a4066b893e029b129623092 100644
--- a/chrome/browser/extensions/extension_webstore_private_apitest.cc
+++ b/chrome/browser/extensions/extension_webstore_private_apitest.cc
@@ -135,6 +135,21 @@ class ExtensionWebstorePrivateApiTest : public ExtensionApiTest {
   }
 };
 
+// The same as ExtensionWebstorePrivateApiTest except it uses the default
+// install prompt behavior.
+class ExtensionNoConfirmWebstorePrivateApiTest
+    : public ExtensionWebstorePrivateApiTest {
+ public:
+  void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
+    // We set this switch here to supercede the value set in
+    // ExtensionWebstorePrivateApiTest (you can't easily remove switches).
+    command_line->AppendSwitchASCII(
+        switches::kAppsGalleryInstallAutoConfirmForTests, "default");
+
+    ExtensionWebstorePrivateApiTest::SetUpCommandLine(command_line);
+  }
+};
+
 class ExtensionWebstorePrivateBundleTest
     : public ExtensionWebstorePrivateApiTest {
  public:
@@ -329,6 +344,16 @@ IN_PROC_BROWSER_TEST_F(ExtensionWebstorePrivateApiTest, BeginInstall) {
   EXPECT_EQ(browser()->profile(), approval->profile);
 }
 
+// Tests that themes are installed without an install prompt.
+IN_PROC_BROWSER_TEST_F(ExtensionNoConfirmWebstorePrivateApiTest, InstallTheme) {
+  WebstoreInstallListener listener;
+  WebstorePrivateApi::SetWebstoreInstallerDelegateForTesting(&listener);
+  ASSERT_TRUE(RunInstallTest("theme.html", "../../theme.crx"));
+  listener.Wait();
+  ASSERT_TRUE(listener.received_success());
+  ASSERT_EQ("iamefpfkojoapidjnbafmgkgncegbkad", listener.id());
+}
+
 // Tests using silentlyInstall to install extensions.
 IN_PROC_BROWSER_TEST_F(ExtensionWebstorePrivateBundleTest, SilentlyInstall) {
   WebstorePrivateApi::SetTrustTestIDsForTesting(true);