Update Skia revision to 7120b2d577d3aab1f51c5af1530a68c57ca51696. (#3667)

* Update Skia revision to 7120b2d577d3aab1f51c5af1530a68c57ca51696.
* Update licenses.
* Account for content handler updates.

DEPS

@@ -22,7 +22,7 @@ vars = {
   'fuchsia_git': 'https://fuchsia.googlesource.com',
   'skia_git': 'https://skia.googlesource.com',
   'github_git': 'https://github.com',
-  'skia_revision': '1be0db86aae4f69df4b71cc387eeda70d72afd56',
+  'skia_revision': '7120b2d577d3aab1f51c5af1530a68c57ca51696',
 
   # Note: When updating the Dart revision, ensure that all entries that are
   # dependencies of dart are also updated

content_handler/vulkan_rasterizer.cc

@@ -130,8 +130,8 @@ VulkanRasterizer::VulkanSurfaceProducer::CreateSurface(uint32_t width,
 
   SkSurfaceProps props(SkSurfaceProps::InitType::kLegacyFontHost_InitType);
 
-  auto sk_surface = SkSurface::MakeFromBackendRenderTarget(
-      context_.get(), desc, SkColorSpace::MakeSRGB(), &props);
+  auto sk_surface = SkSurface::MakeFromBackendRenderTarget(context_.get(), desc,
+                                                           nullptr, &props);
   if (!sk_surface) {
     FTL_LOG(ERROR) << "MakeFromBackendRenderTarget Failed";
     return nullptr;