Adds ChromecastConfig to manage cast_shell's PrefService.

chromecast/common/cast_paths.cc

Index: chromecast/common/cast_paths.cc
diff --git a/chromecast/common/cast_paths.cc b/chromecast/common/cast_paths.cc
index b3a77166d96bb6ce5acfa3f41fdecf87ad7f9ecf..46b6c282414ad5dc5baf0708d52c59866589e048 100644
--- a/chromecast/common/cast_paths.cc
+++ b/chromecast/common/cast_paths.cc
@@ -26,6 +26,17 @@ bool PathProvider(int key, base::FilePath* result) {
 #endif
       return true;
     }
+    case FILE_CAST_CONFIG: {
+      base::FilePath data_dir;
+#if defined(OS_ANDROID)
+      CHECK(PathService::Get(base::DIR_ANDROID_APP_DATA, &data_dir);
+      *result = data_dir.Append(".eureka.conf");

[lcwu1, 2014/08/08 00:22:38]

Why not name the config file the same as Chromecast?

[gunsch, 2014/08/08 00:26:36]

Whoa, this is backwards. Thanks for catching. It was not a 1:1 port from our
downstream, since that was handling this condition at a different code point.

This should be .eureka.conf for Chromecast (to stay with the existing file on
the device). I suspect that needs to remain permanently/until we decide to do a
one-time copy, so we don't lose the preferences.

"cast_shell.conf" was the name we settled on as a better "new name" for Android
build.

+#else
+      CHECK(PathService::Get(DIR_CAST_HOME, &data_dir));
+      *result = data_dir.Append("cast_shell.conf");
+#endif  // defined(OS_ANDROID)
+      return true;
+    }
   }
   return false;
 }