Revert of Refactoring: Move some classes from content/child to platform

content/child/web_memory_dump_provider_adapter.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef WebMemoryDumpProviderAdapter_h
-#define WebMemoryDumpProviderAdapter_h
+#ifndef CONTENT_CHILD_WEB_MEMORY_DUMP_PROVIDER_ADAPTER_H_
+#define CONTENT_CHILD_WEB_MEMORY_DUMP_PROVIDER_ADAPTER_H_
 
 #include "base/macros.h"
 #include "base/trace_event/memory_dump_provider.h"
 
 namespace blink {
+class WebMemoryDumpProvider;
+}  // namespace blink
 
-class WebMemoryDumpProvider;
+namespace content {
 
 // Adapter class which makes it possible to register a WebMemoryDumpProvider (
 // from blink) to base::trace_event::MemoryDumpManager, which expects a
 // MemoryDumpProvider instead.
 // This is essentially proxying the OnMemoryDump from chromium base to blink.
 class WebMemoryDumpProviderAdapter
     : public base::trace_event::MemoryDumpProvider {
  public:
   explicit WebMemoryDumpProviderAdapter(blink::WebMemoryDumpProvider* wmdp);
   ~WebMemoryDumpProviderAdapter() override;
@@ skipping 11 matching lines @@
   // The underlying WebMemoryDumpProvider instance to which the OnMemoryDump()
   // calls will be proxied to.
   blink::WebMemoryDumpProvider* web_memory_dump_provider_;  // Not owned.
 
   // True iff this has been registered with the MDM (and not unregistered yet).
   bool is_registered_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMemoryDumpProviderAdapter);
 };
 
-}  // namespace blink
+}  // namespace content
 
-#endif  // WebMemoryDumpProviderAdapter_h
+#endif  // CONTENT_CHILD_WEB_MEMORY_DUMP_PROVIDER_ADAPTER_H_