Add synchronous method to NewOptimizationGuideDecider

Some features need a synchronous method to call into the Optimization
Guide. This adds one as an option.

Bug: 1313570,1252448
Change-Id: I30bb611e513d5b9d814dbb101ef1782980601551
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3578813
Reviewed-by: Matthew Jones <mdjones@chromium.org>
Commit-Queue: Sophie Chang <sophiechang@chromium.org>
Cr-Commit-Position: refs/heads/main@{#991279}

components/optimization_guide/core/new_optimization_guide_decider.h

@@ -38,6 +38,13 @@ class NewOptimizationGuideDecider {
       proto::OptimizationType optimization_type,
       OptimizationGuideDecisionCallback callback) = 0;
 
+  // Returns whether |optimization_type| can be applied for |url|. This should
+  // only be called for main frame navigations or future main frame navigations.
+  virtual OptimizationGuideDecision CanApplyOptimization(
+      const GURL& url,
+      proto::OptimizationType optimization_type,
+      OptimizationMetadata* optimization_metadata) = 0;
+
  protected:
   NewOptimizationGuideDecider() = default;
   virtual ~NewOptimizationGuideDecider() = default;

ios/chrome/browser/optimization_guide/optimization_guide_service.h

@@ -106,7 +106,7 @@ class OptimizationGuideService
   optimization_guide::OptimizationGuideDecision CanApplyOptimization(
       const GURL& url,
       optimization_guide::proto::OptimizationType optimization_type,
-      optimization_guide::OptimizationMetadata* optimization_metadata);
+      optimization_guide::OptimizationMetadata* optimization_metadata) override;
 
   // Invokes |callback| with the decision for the URL contained in
   // |navigation_context| and |optimization_type|, when sufficient information