webapps: initial addition of splash screen icon downloading

chrome/browser/android/banners/app_banner_data_fetcher_android.h

Index: chrome/browser/android/banners/app_banner_data_fetcher_android.h
diff --git a/chrome/browser/android/banners/app_banner_data_fetcher_android.h b/chrome/browser/android/banners/app_banner_data_fetcher_android.h
index 4858085f4c6fb92ce18011ed2e333c36ffaf4063..00ca792ebbf2cd6fb15625d9b3f6471b32756e28 100644
--- a/chrome/browser/android/banners/app_banner_data_fetcher_android.h
+++ b/chrome/browser/android/banners/app_banner_data_fetcher_android.h
@@ -17,6 +17,7 @@ class AppBannerDataFetcherAndroid : public AppBannerDataFetcher {
   AppBannerDataFetcherAndroid(
       content::WebContents* web_contents,
       base::WeakPtr<Delegate> weak_delegate,
+      int ideal_splash_icon_size,
       int ideal_icon_size);
 
   // Saves information about the Android app being promoted by the current page,
@@ -32,7 +33,11 @@ class AppBannerDataFetcherAndroid : public AppBannerDataFetcher {
   std::string GetBannerType() override;
   std::string GetAppIdentifier() override;
 
+  void OnHasServiceWorker(content::WebContents* web_contents) override;
+
  private:
+  void OnSplashIconFetched(const SkBitmap& bitmap);
+
   void ShowBanner(const SkBitmap* icon,
                   const base::string16& title,
                   const std::string& referrer) override;
@@ -40,6 +45,9 @@ class AppBannerDataFetcherAndroid : public AppBannerDataFetcher {
   base::android::ScopedJavaGlobalRef<jobject> native_app_data_;
   std::string native_app_package_;
 
+  int ideal_splash_icon_size_;
+  scoped_ptr<SkBitmap> splash_icon_;
+
   DISALLOW_COPY_AND_ASSIGN(AppBannerDataFetcherAndroid);
 };