Shuffle media-related WebMimeRegistry code from webkit/ to content/.

content/shell/renderer/shell_content_renderer_client.h

Index: content/shell/renderer/shell_content_renderer_client.h
diff --git a/content/shell/renderer/shell_content_renderer_client.h b/content/shell/renderer/shell_content_renderer_client.h
index 857b5c9d89de14b6b727267a1e3f70c40929dff5..7d5d69fa6076abbf099b06845876e43382c0ba89 100644
--- a/content/shell/renderer/shell_content_renderer_client.h
+++ b/content/shell/renderer/shell_content_renderer_client.h
@@ -25,7 +25,6 @@ class MockWebHyphenator;
 }
 
 class MockWebClipboardImpl;
-class TestShellWebMimeRegistryImpl;
 
 namespace content {
 
@@ -54,7 +53,6 @@ class ShellContentRendererClient : public ContentRendererClient {
   OverrideCreateWebRTCPeerConnectionHandler(
       WebKit::WebRTCPeerConnectionHandlerClient* client) OVERRIDE;
   virtual WebKit::WebClipboard* OverrideWebClipboard() OVERRIDE;
-  virtual WebKit::WebMimeRegistry* OverrideWebMimeRegistry() OVERRIDE;
   virtual WebKit::WebHyphenator* OverrideWebHyphenator() OVERRIDE;
   virtual WebKit::WebThemeEngine* OverrideThemeEngine() OVERRIDE;
   virtual bool AllowBrowserPlugin(
@@ -66,7 +64,6 @@ class ShellContentRendererClient : public ContentRendererClient {
 
   scoped_ptr<ShellRenderProcessObserver> shell_observer_;
   scoped_ptr<MockWebClipboardImpl> clipboard_;
-  scoped_ptr<TestShellWebMimeRegistryImpl> mime_registry_;
   scoped_ptr<webkit_glue::MockWebHyphenator> hyphenator_;
 };