Remove content::ResourceContext implementation for Cast.

None of the content::ResourceContext subclasses actually have any code,
so can just use content::ResourceContext directly instead. Not a huge
step in getting rid of the class, but provides some regression
protection before it can be removed.

Bug: 908955
Change-Id: I950dde99f4b0b096a8d2de84f4e189e9c60c6e9f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4929158
Commit-Queue: Matt Menke <mmenke@chromium.org>
Reviewed-by: Sean Topping <seantopping@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1208957}

chromecast/browser/cast_browser_context.cc

@@ -29,19 +29,8 @@ namespace {
 const void* const kDownloadManagerDelegateKey = &kDownloadManagerDelegateKey;
 }  // namespace
 
-class CastBrowserContext::CastResourceContext
-    : public content::ResourceContext {
- public:
-  CastResourceContext() {}
-
-  CastResourceContext(const CastResourceContext&) = delete;
-  CastResourceContext& operator=(const CastResourceContext&) = delete;
-
-  ~CastResourceContext() override {}
-};
-
 CastBrowserContext::CastBrowserContext()
-    : resource_context_(new CastResourceContext) {
+    : resource_context_(new content::ResourceContext()) {
   profile_metrics::SetBrowserProfileType(
       this, profile_metrics::BrowserProfileType::kRegular);
   InitWhileIOAllowed();

chromecast/browser/cast_browser_context.h

@@ -10,6 +10,7 @@
 #include "base/files/file_path.h"
 #include "components/keyed_service/core/simple_factory_key.h"
 #include "content/public/browser/browser_context.h"
+#include "content/public/browser/resource_context.h"
 
 namespace chromecast {
 namespace shell {
@@ -52,14 +53,12 @@ class CastBrowserContext final : public content::BrowserContext {
   GetReduceAcceptLanguageControllerDelegate() override;
 
  private:
-  class CastResourceContext;
-
   // Performs initialization of the CastBrowserContext while IO is still
   // allowed on the current thread.
   void InitWhileIOAllowed();
 
   base::FilePath path_;
-  std::unique_ptr<CastResourceContext> resource_context_;
+  std::unique_ptr<content::ResourceContext> resource_context_;
   std::unique_ptr<content::PermissionControllerDelegate> permission_manager_;
   std::unique_ptr<SimpleFactoryKey> simple_factory_key_;
 };