Implement GetSkiaTraceMemoryDump and AddSuballocation on chrome blink platform impl

content/child/web_process_memory_dump_impl.h

Index: content/child/web_process_memory_dump_impl.h
diff --git a/content/child/web_process_memory_dump_impl.h b/content/child/web_process_memory_dump_impl.h
index 221db61f1f6dee494656ab52d00eca007308b724..7ae8aabf64bdd51b0c5aec1a014ebdc2835b2a5b 100644
--- a/content/child/web_process_memory_dump_impl.h
+++ b/content/child/web_process_memory_dump_impl.h
@@ -7,7 +7,7 @@
 
 #include "base/containers/scoped_ptr_hash_map.h"
 #include "base/gtest_prod_util.h"
-#include "base/memory/scoped_ptr.h"
+#include "base/memory/scoped_vector.h"
 #include "content/common/content_export.h"
 #include "third_party/WebKit/public/platform/WebProcessMemoryDump.h"
 
@@ -18,6 +18,10 @@ class ProcessMemoryDump;
 }  // namespace base
 }  // namespace trace_event
 
+namespace skia {
+class SkTraceMemoryDump_Chrome;
+}  // namespace skia
+
 namespace content {
 
 class WebMemoryAllocatorDumpImpl;
@@ -53,6 +57,11 @@ class CONTENT_EXPORT WebProcessMemoryDumpImpl final
                                 int importance);
   virtual void AddOwnershipEdge(blink::WebMemoryAllocatorDumpGuid source,
                                 blink::WebMemoryAllocatorDumpGuid target);
+  virtual void AddSuballocation(blink::WebMemoryAllocatorDumpGuid source,
+                                const blink::WebString& targetNodeName);
+  virtual SkTraceMemoryDump* CreateDumpAdapterForSkia(
+      blink::WebMemoryDumpLevelOfDetail levelOfDetail,
+      const blink::WebString& dumpNamePrefix);
 
   const base::trace_event::ProcessMemoryDump* process_memory_dump() const {
     return process_memory_dump_;
@@ -80,6 +89,9 @@ class CONTENT_EXPORT WebProcessMemoryDumpImpl final
                          scoped_ptr<WebMemoryAllocatorDumpImpl>>
       memory_allocator_dumps_;
 
+  // Stores SkTraceMemoryDump for the current ProcessMemoryDump.

[Primiano Tucci (use gerrit), 2015/09/09 16:16:42]

Please say: this class handles the memory ownership of the SkTraceMemoryDump
instace returned. It is guaranteed to be valid through all the lifetime of
WebProcessMemoryDumpImpl.

[ssid, 2015/09/10 11:08:26]

Done.

+  ScopedVector<skia::SkTraceMemoryDump_Chrome> sk_trace_dump_list_;
+
   DISALLOW_COPY_AND_ASSIGN(WebProcessMemoryDumpImpl);
 };