Add a full Blimp integration test.

blimp/engine/browser_tests/blimp_browser_test.h

 // Copyright 2016 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 BLIMP_ENGINE_BROWSER_TESTS_BLIMP_BROWSER_TEST_H_
 #define BLIMP_ENGINE_BROWSER_TESTS_BLIMP_BROWSER_TEST_H_
 
 #include <memory>
 
 #include "base/synchronization/waitable_event.h"
+#include "base/threading/thread_restrictions.h"
 #include "content/public/test/browser_test_base.h"
 
 namespace base {
 class RunLoop;
 }
 
 namespace content {
 class WebContents;
 }
 
@@ skipping 18 matching lines @@
   void SignalCompletion();
 
  protected:
   BlimpBrowserTest();
   ~BlimpBrowserTest() override;
 
   // Processes tasks in the UI and IO thread until SignalCompletion() is
   // called.
   void RunUntilCompletion();
 
+  // Allow the UI thread to wait.  This bypasses base::ThreadRestrictions and is
+  // used for client/engine integration tests.
+  void AllowUIWaits();
+
   engine::BlimpEngineSession* GetEngineSession();
 
   client::Assignment GetAssignment();
 
   // testing::Test implementation.
   void SetUp() override;
 
   // content::BrowserTestBase implementation.
   void RunTestOnMainThreadLoop() override;
   void SetUpCommandLine(base::CommandLine* command_line) override;
   void SetUpOnMainThread() override;
   void TearDownOnMainThread() override;
 
  private:
   // Receives the port number from an asynchronously connected socket.
   // Calls SignalCompletion() when set.
   void OnGetEnginePortCompletion(uint16_t port);
 
   uint16_t engine_port_;
 
   // Used to signal the completion of asynchronous processing to
   // RunUntilCompletion().
   base::WaitableEvent completion_event_;
 
+  // Used to allow UI thread waits.  This is useful for integration tests that
+  // require setting up client components, as testing those sometimes requires
+  // setting up GL contexts that might block.
+  std::unique_ptr<base::ThreadRestrictions::ScopedAllowWait> allow_ui_waits_;
+
   DISALLOW_COPY_AND_ASSIGN(BlimpBrowserTest);
 };
 
 }  // namespace blimp
 
 #endif  // BLIMP_ENGINE_BROWSER_TESTS_BLIMP_BROWSER_TEST_H_