Implement kCurrentThemeID so we can know what the last theme to be installed ...

chrome/browser/browser_theme_provider.cc

Index: chrome/browser/browser_theme_provider.cc
===================================================================
--- chrome/browser/browser_theme_provider.cc	(revision 22263)
+++ chrome/browser/browser_theme_provider.cc	(working copy)
@@ -126,6 +126,9 @@
 const skia::HSL BrowserThemeProvider::kDefaultTintBackgroundTab =
     { -1, 0.5, 0.75 };
 
+// Saved default values.
+const char* BrowserThemeProvider::kDefaultThemeID = "";
+
 // Default display properties.
 static const int kDefaultDisplayPropertyNTPAlignment =
     BrowserThemeProvider::ALIGN_BOTTOM;
@@ -369,6 +372,7 @@
   SaveColorData();
   SaveTintData();
   SaveDisplayPropertyData();
+  SaveThemeID(extension->id());
 
   NotifyThemeChanged();
   UserMetrics::RecordAction(L"Themes_Installed", profile_);
@@ -380,6 +384,11 @@
   UserMetrics::RecordAction(L"Themes_Reset", profile_);
 }
 
+std::string BrowserThemeProvider::GetThemeID() {
+  std::wstring id = profile_->GetPrefs()->GetString(prefs::kCurrentThemeID);
+  return WideToUTF8(id);
+}
+
 bool BrowserThemeProvider::ReadThemeFileData(
     int id, std::vector<unsigned char>* raw_data) {
   if (images_.count(id)) {
@@ -776,6 +785,7 @@
   SaveColorData();
   SaveTintData();
   SaveDisplayPropertyData();
+  SaveThemeID(kDefaultThemeID);
 }
 
 SkBitmap* BrowserThemeProvider::GenerateBitmap(int id) {
@@ -905,6 +915,10 @@
   }
 }
 
+void BrowserThemeProvider::SaveThemeID(const std::string& id) {
+  profile_->GetPrefs()->SetString(prefs::kCurrentThemeID, UTF8ToWide(id));
+}
+
 void BrowserThemeProvider::NotifyThemeChanged() {
   // Redraw!
   NotificationService* service = NotificationService::current();