Convert PageLoadMetrics to Mojo

mojo/public/cpp/bindings/lib/interface_ptr_state.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MOJO_PUBLIC_CPP_BINDINGS_LIB_INTERFACE_PTR_STATE_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_LIB_INTERFACE_PTR_STATE_H_
 
 #include <stdint.h>
 
 #include <algorithm>  // For |std::swap()|.
@@ skipping 75 matching lines @@
 
   void Swap(InterfacePtrState* other) {
     using std::swap;
     swap(other->proxy_, proxy_);
     swap(other->router_, router_);
     handle_.swap(other->handle_);
     runner_.swap(other->runner_);
     swap(other->version_, version_);
   }
 
-  void Bind(InterfacePtrInfo<Interface> info,
-            scoped_refptr<base::SingleThreadTaskRunner> runner) {
-    DCHECK(!proxy_);
-    DCHECK(!router_);
-    DCHECK(!handle_.is_valid());
-    DCHECK_EQ(0u, version_);
-    DCHECK(info.is_valid());
+  bool WaitForIncomingResponse() override {
+    ConfigureProxyIfNecessary();
 
     handle_ = info.PassHandle();
     version_ = info.version();
     runner_ = std::move(runner);
   }
 
   bool HasAssociatedInterfaces() const { return false; }
 
   // After this method is called, the object is in an invalid state and
   // shouldn't be reused.
@@ skipping 138 matching lines @@
 
     handle_ = info.PassHandle();
     version_ = info.version();
     runner_ = std::move(runner);
   }
 
   bool HasAssociatedInterfaces() const {
     return router_ ? router_->HasAssociatedEndpoints() : false;
   }
 
+  bool WaitForIncomingResponse() {
+    ConfigureProxyIfNecessary();
+
+    DCHECK(router_);
+    return router_->WaitForIncomingMessage(MOJO_DEADLINE_INDEFINITE);
+  }
+
   // After this method is called, the object is in an invalid state and
   // shouldn't be reused.
   InterfacePtrInfo<Interface> PassInterface() {
     endpoint_client_.reset();
     proxy_.reset();
     return InterfacePtrInfo<Interface>(
         router_ ? router_->PassMessagePipe() : std::move(handle_), version_);
   }
 
   bool is_bound() const { return handle_.is_valid() || endpoint_client_; }
@@ skipping 68 matching lines @@
 
   uint32_t version_;
 
   DISALLOW_COPY_AND_ASSIGN(InterfacePtrState);
 };
 
 }  // namespace internal
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_INTERFACE_PTR_STATE_H_