Refactor extension handling code from AppShimHost into ExtensionAppShimHandler.

apps/app_shim/app_shim_host_mac_unittest.cc

Index: apps/app_shim/app_shim_host_mac_unittest.cc
diff --git a/apps/app_shim/app_shim_host_mac_unittest.cc b/apps/app_shim/app_shim_host_mac_unittest.cc
index 476b2ceb43748126aa5fe940e232f1c119215184..c94d5f32e6a23148661f85442b97edfae7fe57b1 100644
--- a/apps/app_shim/app_shim_host_mac_unittest.cc
+++ b/apps/app_shim/app_shim_host_mac_unittest.cc
@@ -42,7 +42,6 @@ class TestingAppShimHost : public AppShimHost {
  protected:
   virtual Profile* FetchProfileForDirectory(const std::string& profile_dir)
       OVERRIDE;
-  virtual bool LaunchApp(Profile* profile) OVERRIDE;
   virtual bool Send(IPC::Message* message) OVERRIDE;
 
  private:
@@ -77,10 +76,6 @@ Profile* TestingAppShimHost::FetchProfileForDirectory(
   return fails_profile_ ? NULL : test_profile_;
 }
 
-bool TestingAppShimHost::LaunchApp(Profile* profile) {
-  return !fails_launch_;
-}
-
 class AppShimHostTest : public testing::Test,
                         public apps::AppShimHandler {
  public:
@@ -132,14 +127,6 @@ const char kTestProfileDir[] = "Default";
 
 }  // namespace
 
-TEST_F(AppShimHostTest, TestLaunchApp) {
-  host()->ReceiveMessage(
-      new AppShimHostMsg_LaunchApp(kTestProfileDir, kTestAppId));
-  ASSERT_EQ(kTestAppId, host()->GetAppId());
-  ASSERT_EQ(profile(), host()->GetProfile());
-  ASSERT_TRUE(LaunchWasSuccessful());
-}
-
 TEST_F(AppShimHostTest, TestLaunchAppWithHandler) {
   apps::AppShimHandler::RegisterHandler(kTestAppId, this);
   EXPECT_TRUE(host()->ReceiveMessage(