Skia: Enable ExplicitlyAllocateGPUResources & SortRenderTargets.

Enable those two options which may improve skia performance.

Bug: 894492

Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
Change-Id: I80a1b9d1ce018d90ab91e5e676b6d09a7dc23d8d
Reviewed-on: https://chromium-review.googlesource.com/c/1273267
Commit-Queue: Peng Huang <penghuang@chromium.org>
Reviewed-by: Antoine Labour <piman@chromium.org>
Reviewed-by: Robert Phillips <robertphillips@google.com>
Cr-Commit-Position: refs/heads/master@{#599321}

components/viz/service/gl/gpu_service_impl.cc

@@ -343,6 +343,7 @@ bool GpuServiceImpl::GetGrContextForGLSurface(gl::GLSurface* surface,
 
     GrContextOptions options;
     options.fExplicitlyAllocateGPUResources = GrContextOptions::Enable::kYes;
+    options.fSortRenderTargets = GrContextOptions::Enable::kYes;
     options.fUseGLBufferDataNullHint = GrContextOptions::Enable::kYes;
     data.gr_context = GrContext::MakeGL(std::move(native_interface), options);
     DCHECK(data.gr_context);

gpu/skia_bindings/grcontext_for_gles2_interface.cc

@@ -38,6 +38,8 @@ GrContextForGLES2Interface::GrContextForGLES2Interface(
   options.fAvoidStencilBuffers = capabilities.avoid_stencil_buffers;
   options.fAllowPathMaskCaching = false;
   options.fSharpenMipmappedTextures = true;
+  options.fExplicitlyAllocateGPUResources = GrContextOptions::Enable::kYes;
+  options.fSortRenderTargets = GrContextOptions::Enable::kYes;
   sk_sp<GrGLInterface> interface(
       skia_bindings::CreateGLES2InterfaceBindings(gl, context_support));
   gr_context_ = GrContext::MakeGL(std::move(interface), options);