Componentize TopSites, TopSitesBackend, TopSitesDatabase

chrome/browser/history/top_sites_factory.cc

Index: chrome/browser/history/top_sites_factory.cc
diff --git a/chrome/browser/history/top_sites_factory.cc b/chrome/browser/history/top_sites_factory.cc
index b0e77b55ee94eb28289c986fa513eafb6cd28dba..a2a7db2c3d2d20996dfc9dd9ea66a15a9bf1e5fc 100644
--- a/chrome/browser/history/top_sites_factory.cc
+++ b/chrome/browser/history/top_sites_factory.cc
@@ -4,11 +4,67 @@
 
 #include "chrome/browser/history/top_sites_factory.h"
 
+#include "base/macros.h"
 #include "base/memory/singleton.h"
 #include "chrome/browser/history/top_sites_impl.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/chrome_constants.h"
+#include "chrome/grit/chromium_strings.h"
+#include "chrome/grit/generated_resources.h"
+#include "chrome/grit/locale_settings.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
+#include "content/public/browser/browser_thread.h"
+#include "grit/theme_resources.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "url/gurl.h"
+
+namespace {
+
+struct RawPrepopulatedPage {
+  int url_id;        // The resource for the page URL.
+  int title_id;      // The resource for the page title.
+  int favicon_id;    // The raw data resource for the favicon.
+  int thumbnail_id;  // The raw data resource for the thumbnail.
+  SkColor color;     // The best color to highlight the page (should roughly
+                     // match favicon).
+};
+
+#if !defined(OS_ANDROID)
+// Android does not use prepopulated pages.
+const RawPrepopulatedPage kRawPrepopulatedPages[] = {
+    {
+     IDS_CHROME_WELCOME_URL,
+     IDS_NEW_TAB_CHROME_WELCOME_PAGE_TITLE,
+     IDR_PRODUCT_LOGO_16,
+     IDR_NEWTAB_CHROME_WELCOME_PAGE_THUMBNAIL,
+     SkColorSetRGB(0, 147, 60),
+    },
+    {
+     IDS_WEBSTORE_URL,
+     IDS_EXTENSION_WEB_STORE_TITLE,
+     IDR_WEBSTORE_ICON_16,
+     IDR_NEWTAB_WEBSTORE_THUMBNAIL,
+     SkColorSetRGB(63, 132, 197),
+    },
+};
+#endif
+
+void InitializePrepopulatedPageList(
+    history::PrepopulatedPageList* prepopulated_pages) {
+#if !defined(OS_ANDROID)
+  DCHECK(prepopulated_pages);
+  prepopulated_pages->reserve(arraysize(kRawPrepopulatedPages));
+  for (size_t i = 0; i < arraysize(kRawPrepopulatedPages); ++i) {
+    const RawPrepopulatedPage& page = kRawPrepopulatedPages[i];
+    prepopulated_pages->push_back(history::PrepopulatedPage(
+        GURL(l10n_util::GetStringUTF8(page.url_id)),
+        l10n_util::GetStringUTF16(page.title_id), page.favicon_id,
+        page.thumbnail_id, page.color));
+  }
+#endif
+}
+
+}  // namespace
 
 // static
 scoped_refptr<history::TopSites> TopSitesFactory::GetForProfile(
@@ -40,9 +96,14 @@ TopSitesFactory::~TopSitesFactory() {
 
 scoped_refptr<RefcountedKeyedService> TopSitesFactory::BuildServiceInstanceFor(
     content::BrowserContext* context) const {
-  history::TopSitesImpl* top_sites =
-      new history::TopSitesImpl(static_cast<Profile*>(context));
-  top_sites->Init(context->GetPath().Append(chrome::kTopSitesFilename));
+  history::PrepopulatedPageList prepopulated_pages;
+  InitializePrepopulatedPageList(&prepopulated_pages);
+
+  history::TopSitesImpl* top_sites = new history::TopSitesImpl(
+      static_cast<Profile*>(context), prepopulated_pages);
+  top_sites->Init(context->GetPath().Append(chrome::kTopSitesFilename),
+                  content::BrowserThread::GetMessageLoopProxyForThread(
+                      content::BrowserThread::DB));
   return make_scoped_refptr(top_sites);
 }