[tracing] Add SkResourceCache statistics to chrome://tracing (chrome side)

skia/ext/skia_memory_dump_provider.cc

Index: skia/ext/skia_memory_dump_provider.cc
diff --git a/skia/ext/skia_memory_dump_provider.cc b/skia/ext/skia_memory_dump_provider.cc
index 3944ad40fa3d48b0589678166b49796d6e93e572..3682679cd6b77dc18f19d1c81e2d6b48e6747794 100644
--- a/skia/ext/skia_memory_dump_provider.cc
+++ b/skia/ext/skia_memory_dump_provider.cc
@@ -7,6 +7,7 @@
 #include "base/trace_event/memory_allocator_dump.h"
 #include "base/trace_event/memory_dump_manager.h"
 #include "base/trace_event/process_memory_dump.h"
+#include "skia/ext/SkTraceMemoryDump_chrome.h"
 #include "third_party/skia/include/core/SkGraphics.h"
 #include "third_party/skia/src/core/SkResourceCache.h"
 
@@ -27,15 +28,25 @@ bool SkiaMemoryDumpProvider::OnMemoryDump(
     base::trace_event::ProcessMemoryDump* process_memory_dump) {
   auto font_mad =
       process_memory_dump->CreateAllocatorDump("skia/sk_font_cache");
-  font_mad->AddScalar("size", "bytes", SkGraphics::GetFontCacheUsed());
-  font_mad->AddScalar("count", "objects", SkGraphics::GetFontCacheCountUsed());
+  font_mad->AddScalar(base::trace_event::MemoryAllocatorDump::kNameSize,
+                      base::trace_event::MemoryAllocatorDump::kUnitsBytes,
+                      SkGraphics::GetFontCacheUsed());
+  font_mad->AddScalar(base::trace_event::MemoryAllocatorDump::kNameObjectsCount,
+                      base::trace_event::MemoryAllocatorDump::kUnitsObjects,
+                      SkGraphics::GetFontCacheCountUsed());
 
   auto resource_mad =
       process_memory_dump->CreateAllocatorDump("skia/sk_resource_cache");
-  resource_mad->AddScalar("size", "bytes",
+  resource_mad->AddScalar(base::trace_event::MemoryAllocatorDump::kNameSize,
+                          base::trace_event::MemoryAllocatorDump::kUnitsBytes,
                           SkResourceCache::GetTotalBytesUsed());
-  // TODO(ssid): crbug.com/503168. Add sub-allocation edges from discardable or
-  // malloc memory dumps to avoid double counting.
+
+  if (args.level_of_detail ==
+      base::trace_event::MemoryDumpArgs::LevelOfDetail::LOW)
+    return true;
+
+  SkTraceMemoryDump_Chrome skia_dumper(process_memory_dump);
+  SkResourceCache::DumpMemoryStatistics(&skia_dumper);

[Primiano Tucci (use gerrit), 2015/08/26 15:34:01]

s/skia_dumper/skia_memoryinfra_wrapper/ or something similar. that obj is not a
skia dumper, jusdt a wrapper interfacve.

 
   return true;
 }