Move WebCache memory dump provider to blink for sub-allocation edges.

third_party/WebKit/public/platform/WebProcessMemoryDump.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 WebProcessMemoryDump_h
 #define WebProcessMemoryDump_h
 
 #include "WebCommon.h"
 #include "WebMemoryAllocatorDump.h"
 #include "WebString.h"
+#include "third_party/skia/include/core/SkTraceMemoryDump.h"
 
 namespace blink {
 
 // A container which holds all the dumps for the various allocators for a given
 // process. Embedders of WebMemoryDumpProvider are expected to populate a
 // WebProcessMemoryDump instance with the stats of their allocators.
 class BLINK_PLATFORM_EXPORT WebProcessMemoryDump {
 public:
     virtual ~WebProcessMemoryDump();
 
@@ skipping 49 matching lines @@
     // memory.
     virtual void AddOwnershipEdge(WebMemoryAllocatorDumpGuid source, WebMemoryAllocatorDumpGuid target, int importance)
     {
         BLINK_ASSERT_NOT_REACHED();
     }
 
     virtual void AddOwnershipEdge(WebMemoryAllocatorDumpGuid source, WebMemoryAllocatorDumpGuid target)
     {
         BLINK_ASSERT_NOT_REACHED();
     }
+
+    // Returns the SkTraceMemoryDump object for the skia context. This is
+    // useful when dumping stats about skia objects used. The created dumper
+    // is owned by WebProcessMemoryDump. |dumpNamePrefix| is prefix appended
+    // to each dump created by the SkTraceMemoryDump implementation, if the
+    // dump should be placed under different category
+    // and not "skia".
+    virtual SkTraceMemoryDump* CreateSkiaTraceMemoryDump(const WebString& dumpNamePrefix)
+    {
+        BLINK_ASSERT_NOT_REACHED();
+        return nullptr;
+    }
 };
 
 } // namespace blink
 
 #endif // WebProcessMemoryDump_h