Reorganizes Chromecast code to better reflect functional dependencies.

chromecast/browser/cast_browser_main_parts.h

Index: chromecast/browser/cast_browser_main_parts.h
diff --git a/chromecast/shell/browser/cast_browser_main_parts.h b/chromecast/browser/cast_browser_main_parts.h
similarity index 88%
rename from chromecast/shell/browser/cast_browser_main_parts.h
rename to chromecast/browser/cast_browser_main_parts.h
index b109f1385bca85f50aba3d6d61da65ab1a77cc28..3220faf8e084e067fef8b61eb6ab75cdca1a7325 100644
--- a/chromecast/shell/browser/cast_browser_main_parts.h
+++ b/chromecast/browser/cast_browser_main_parts.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CHROMECAST_SHELL_BROWSER_CAST_BROWSER_MAIN_PARTS_H_
-#define CHROMECAST_SHELL_BROWSER_CAST_BROWSER_MAIN_PARTS_H_
+#ifndef CHROMECAST_BROWSER_CAST_BROWSER_MAIN_PARTS_H_
+#define CHROMECAST_BROWSER_CAST_BROWSER_MAIN_PARTS_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
@@ -42,4 +42,4 @@ class CastBrowserMainParts : public content::BrowserMainParts {
 }  // namespace shell
 }  // namespace chromecast
 
-#endif  // CHROMECAST_SHELL_BROWSER_CAST_BROWSER_MAIN_PARTS_H_
+#endif  // CHROMECAST_BROWSER_CAST_BROWSER_MAIN_PARTS_H_