Enable device orientation by default.

chrome/browser/device_orientation/device_orientation_browsertest.cc

 // Copyright (c) 2010 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/command_line.h"
 #include "base/file_path.h"
 #include "base/ref_counted.h"
 #include "chrome/browser/browser.h"
 #include "chrome/browser/device_orientation/orientation.h"
 #include "chrome/browser/device_orientation/provider.h"
@@ skipping 20 matching lines @@
   }
   Orientation orientation_;
   bool added_observer_;
   bool removed_observer_;
 };
 
 class DeviceOrientationBrowserTest : public InProcessBrowserTest {
  public:
   // From InProcessBrowserTest.
   virtual void SetUpCommandLine(CommandLine* command_line) {
-    command_line->AppendSwitch(switches::kEnableDeviceOrientation);
+    EXPECT_TRUE(!command_line->HasSwitch(switches::kDisableDeviceOrientation));
   }
 
   GURL testUrl(const FilePath::CharType* filename) {
     const FilePath kTestDir(FILE_PATH_LITERAL("device_orientation"));
     return ui_test_utils::GetTestUrl(kTestDir, FilePath(filename));
   }
 };
 
 IN_PROC_BROWSER_TEST_F(DeviceOrientationBrowserTest, BasicTest) {
   const Orientation kTestOrientation(true, 1, true, 2, true, 3);
   scoped_refptr<MockProvider> provider = new MockProvider(kTestOrientation);
   Provider::SetInstanceForTests(provider.get());
 
   // The test page will register an event handler for orientation events,
   // expects to get an event with kTestOrientation orientation,
   // then removes the event handler and navigates to #pass.
   GURL test_url = testUrl(FILE_PATH_LITERAL("device_orientation_test.html"));
   ui_test_utils::NavigateToURLBlockUntilNavigationsComplete(browser(),
                                                             test_url,
                                                             2);
 
   // Check that the page got the event it expected and that the provider
   // saw requests for adding and removing an observer.
   EXPECT_EQ("pass", browser()->GetSelectedTabContents()->GetURL().ref());
   EXPECT_TRUE(provider->added_observer_);
   EXPECT_TRUE(provider->removed_observer_);
 }
 
 } //  namespace device_orientation