Change IO thread shader cache strategy (#13121)

So it's the same with the GPU thread.

Otherwise, some shaders may be cached in binary on the IO thread, and we will lose them when we do the SkSL precompile.

For b/140174804

Author: liyuqian

shell/common/persistent_cache.cc

@@ -47,7 +47,7 @@ std::atomic<bool> PersistentCache::cache_sksl_ = false;
 std::atomic<bool> PersistentCache::strategy_set_ = false;
 
 void PersistentCache::SetCacheSkSL(bool value) {
-  if (strategy_set_) {
+  if (strategy_set_ && value != cache_sksl_) {
     FML_LOG(ERROR) << "Cache SkSL can only be set before the "
                       "GrContextOptions::fShaderCacheStrategy is set.";
     return;

shell/common/shell_io_manager.cc

@@ -19,6 +19,12 @@ sk_sp<GrContext> ShellIOManager::CreateCompatibleResourceLoadingContext(
 
   GrContextOptions options = {};
 
+  if (PersistentCache::cache_sksl()) {
+    FML_LOG(INFO) << "Cache SkSL";
+    options.fShaderCacheStrategy = GrContextOptions::ShaderCacheStrategy::kSkSL;
+  }
+  PersistentCache::MarkStrategySet();
+
   options.fPersistentCache = PersistentCache::GetCacheForProcess();
 
   // There is currently a bug with doing GPU YUV to RGB conversions on the IO

shell/gpu/gpu_surface_gl.cc

@@ -50,8 +50,8 @@ GPUSurfaceGL::GPUSurfaceGL(GPUSurfaceGLDelegate* delegate,
   if (PersistentCache::cache_sksl()) {
     FML_LOG(INFO) << "Cache SkSL";
     options.fShaderCacheStrategy = GrContextOptions::ShaderCacheStrategy::kSkSL;
-    PersistentCache::MarkStrategySet();
   }
+  PersistentCache::MarkStrategySet();
   options.fPersistentCache = PersistentCache::GetCacheForProcess();
 
   options.fAvoidStencilBuffers = true;