[Autofill] Migrate ChromePasswordManagerClient<-->PasswordGenerationAgent IPCs to mojo.

content/common/associated_interface_provider_impl.h

Index: content/common/associated_interface_provider_impl.h
diff --git a/content/common/associated_interface_provider_impl.h b/content/common/associated_interface_provider_impl.h
index af01ce55427a5ee9fa6916635c7e066d05ca206a..380bff847b7289488f3badbbd4fd4f855f3e077e 100644
--- a/content/common/associated_interface_provider_impl.h
+++ b/content/common/associated_interface_provider_impl.h
@@ -5,10 +5,13 @@
 #include "content/public/common/associated_interface_provider.h"
 
 #include <stdint.h>
+#include <memory>
 
 #include "base/macros.h"
 #include "content/common/associated_interfaces.mojom.h"
+#include "mojo/public/cpp/bindings/associated_binding.h"
 #include "mojo/public/cpp/bindings/associated_group.h"
+#include "mojo/public/cpp/bindings/binding.h"
 
 namespace content {
 
@@ -17,16 +20,61 @@ class AssociatedInterfaceProviderImpl : public AssociatedInterfaceProvider {
   // Binds this to a remote mojom::AssociatedInterfaceProvider.
   explicit AssociatedInterfaceProviderImpl(
       mojom::AssociatedInterfaceProviderAssociatedPtr proxy);
+  // This constructor is only used for some tests when there has no injected
+  // mojom::AssociatedInterfaceProviderAssociatedPtr. Here will emulate it
+  // by providing self-contained local implementations of both
+  // mojom::RouteProvider and mojom::AssociatedInterfaceProvider.
+  AssociatedInterfaceProviderImpl();
   ~AssociatedInterfaceProviderImpl() override;
 
   // AssociatedInterfaceProvider:
   void GetInterface(const std::string& name,
                     mojo::ScopedInterfaceEndpointHandle handle) override;
   mojo::AssociatedGroup* GetAssociatedGroup() override;
+  void OverrideBinderForTesting(
+      const std::string& name,
+      const base::Callback<void(mojo::ScopedInterfaceEndpointHandle)>& binder)
+      override;
 
  private:
+  class LocalProvider : public mojom::RouteProvider,
+                        mojom::AssociatedInterfaceProvider {
+   public:
+    explicit LocalProvider(
+        mojom::AssociatedInterfaceProviderAssociatedPtr* proxy);
+    ~LocalProvider() override;
+
+    void SetBinderForName(const std::string& name,
+                          const base::Callback<void(
+                              mojo::ScopedInterfaceEndpointHandle)>& binder);
+
+   private:
+    // mojom::RouteProvider:
+    void GetRoute(
+        int32_t routing_id,
+        mojom::AssociatedInterfaceProviderAssociatedRequest request) override;
+
+    // mojom::AssociatedInterfaceProvider:
+    void GetAssociatedInterface(
+        const std::string& name,
+        mojom::AssociatedInterfaceAssociatedRequest request) override;
+
+    using BinderMap =
+        std::map<std::string,
+                 base::Callback<void(mojo::ScopedInterfaceEndpointHandle)>>;
+    BinderMap binders_;
+
+    mojom::RouteProviderPtr route_provider_ptr_;
+    mojo::Binding<mojom::RouteProvider> route_provider_binding_;
+
+    mojo::AssociatedBinding<mojom::AssociatedInterfaceProvider>
+        associated_interface_provider_binding_;
+  };
+
   mojom::AssociatedInterfaceProviderAssociatedPtr proxy_;
 
+  std::unique_ptr<LocalProvider> local_provider_;
+
   DISALLOW_COPY_AND_ASSIGN(AssociatedInterfaceProviderImpl);
 };