Refactoring: Move some classes from content/child to platform

content/child/blink_platform_impl.h

Index: content/child/blink_platform_impl.h
diff --git a/content/child/blink_platform_impl.h b/content/child/blink_platform_impl.h
index 141868981b8d46995fa2ff22574d9fe0c05da060..afd69a30acb6d8168a49f2c056c9a528e5160983 100644
--- a/content/child/blink_platform_impl.h
+++ b/content/child/blink_platform_impl.h
@@ -52,7 +52,6 @@ class ThreadSafeSender;
 class TraceLogObserverAdapter;
 class WebCryptoImpl;
 class WebGeofencingProviderImpl;
-class WebMemoryDumpProviderAdapter;
 
 class CONTENT_EXPORT BlinkPlatformImpl
     : NON_EXPORTED_BASE(public blink::Platform) {
@@ -121,7 +120,6 @@ class CONTENT_EXPORT BlinkPlatformImpl
                                   const char* name) override;
   void unregisterMemoryDumpProvider(
       blink::WebMemoryDumpProvider* wmdp) override;
-  blink::WebProcessMemoryDump* createProcessMemoryDump() override;
   blink::Platform::WebMemoryAllocatorDumpGuid createWebMemoryAllocatorDumpGuid(
       const blink::WebString& guidStr) override;
   void addTraceLogEnabledStateObserver(
@@ -184,9 +182,6 @@ class CONTENT_EXPORT BlinkPlatformImpl
   base::ThreadLocalStorage::Slot current_thread_slot_;
   webcrypto::WebCryptoImpl web_crypto_;
   scoped_ptr<WebGeofencingProviderImpl> geofencing_provider_;
-  base::ScopedPtrHashMap<blink::WebMemoryDumpProvider*,
-                         scoped_ptr<WebMemoryDumpProviderAdapter>>
-      memory_dump_providers_;
   base::ScopedPtrHashMap<blink::Platform::TraceLogEnabledStateObserver*,
                          scoped_ptr<TraceLogObserverAdapter>>
       trace_log_observers_;