GLImage::OnMemoryDump Stubs + Some Impls

ui/gl/gl_image_io_surface.mm

Index: ui/gl/gl_image_io_surface.mm
diff --git a/ui/gl/gl_image_io_surface.mm b/ui/gl/gl_image_io_surface.mm
index 3b8edcb13d79d7708bf1e4b5cbcbbbac53d617a7..24ec2716506705e4fea56b0565c63a1ec013271f 100644
--- a/ui/gl/gl_image_io_surface.mm
+++ b/ui/gl/gl_image_io_surface.mm
@@ -127,9 +127,11 @@ GLenum DataType(BufferFormat format) {
 
 }  // namespace
 
-GLImageIOSurface::GLImageIOSurface(const gfx::Size& size,
+GLImageIOSurface::GLImageIOSurface(gfx::GenericSharedMemoryId io_surface_id,
+                                   const gfx::Size& size,
                                    unsigned internalformat)
-    : size_(size),
+    : io_surface_id_(io_surface_id),
+      size_(size),
       internalformat_(internalformat),
       format_(BufferFormat::RGBA_8888) {}
 
@@ -211,6 +213,23 @@ base::ScopedCFTypeRef<IOSurfaceRef> GLImageIOSurface::io_surface() {
   return io_surface_;
 }
 
+void GLImageIOSurface::OnMemoryDump(base::trace_event::ProcessMemoryDump* pmd,
+                                    uint64_t process_tracing_id,
+                                    const std::string& dump_name) {
+  size_t size_bytes = IOSurfaceGetAllocSize(io_surface_);
+
+  base::trace_event::MemoryAllocatorDump* dump =
+      pmd->CreateAllocatorDump(dump_name);
+  dump->AddScalar(base::trace_event::MemoryAllocatorDump::kNameSize,
+                  base::trace_event::MemoryAllocatorDump::kUnitsBytes,
+                  static_cast<uint64_t>(size_bytes));
+
+  auto guid = gfx::GetGenericSharedMemoryGUIDForTracing(process_tracing_id,
+                                                        io_surface_id_);
+  pmd->CreateSharedGlobalAllocatorDump(guid);
+  pmd->AddOwnershipEdge(dump->guid(), guid);
+}
+
 // static
 void GLImageIOSurface::SetLayerForWidget(
     gfx::AcceleratedWidget widget, CALayer* layer) {