Teach tools/skydb how to take a URL as a parameter.

sky/tools/debugger/prompt/prompt.cc

 // 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.
 
 #include "base/bind.h"
 #include "base/memory/weak_ptr.h"
 #include "mojo/application/application_runner_chromium.h"
 #include "mojo/public/c/system/main.h"
 #include "mojo/public/cpp/application/application_delegate.h"
 #include "mojo/public/cpp/application/application_impl.h"
@@ skipping 25 matching lines @@
       : is_tracing_(false),
         weak_ptr_factory_(this) {
   }
   virtual ~Prompt() {
   }
 
  private:
   // Overridden from mojo::ApplicationDelegate:
   virtual void Initialize(mojo::ApplicationImpl* app) override {
     app->ConnectToService("mojo:sky_viewer", &tracing_);
-    ScheduleWaitForInput();
+    if (app->args().size() > 1)
+      url_ = app->args()[1];
   }
 
   virtual bool ConfigureIncomingConnection(
       mojo::ApplicationConnection* connection) override {
     connection->ConnectToService(&debugger_);
+    if (!url_.empty())
+      Reload();
+    ScheduleWaitForInput();
     return true;
   }
 
   bool ExecuteCommand(const std::string& command) {
     if (command == "help") {
       PrintHelp();
       return true;
     }
     if (command == "trace") {
       ToggleTracing();
@@ skipping 76 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(Prompt);
 };
 
 }  // namespace debugger
 }  // namespace sky
 
 MojoResult MojoMain(MojoHandle shell_handle) {
   mojo::ApplicationRunnerChromium runner(new sky::debugger::Prompt);
   return runner.Run(shell_handle);
 }