Removes unnecessary namespace qualifier in device_orientation

This is a follow-up to a previous patch (https://chromiumcodereview.appspot.com/10823318/).
The previous patch moved device_orientation to the content namespace. This patch removes
the now unnecessary qualifier of "content::" in several places.


BUG=none


Review URL: https://chromiumcodereview.appspot.com/10854185

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@151907 0039d316-1c4b-4281-b951-d872f2087c98

content/browser/device_orientation/device_orientation_browsertest.cc

@@ -43,7 +43,7 @@ class MockProvider : public Provider {
   virtual ~MockProvider() {}
 };
 
-class DeviceOrientationBrowserTest : public content::ContentBrowserTest {
+class DeviceOrientationBrowserTest : public ContentBrowserTest {
  public:
   // From ContentBrowserTest.
   virtual void SetUpCommandLine(CommandLine* command_line) {
@@ -65,9 +65,9 @@ IN_PROC_BROWSER_TEST_F(DeviceOrientationBrowserTest, BasicTest) {
   // 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 = content::GetTestUrl(
+  GURL test_url = GetTestUrl(
       "device_orientation", "device_orientation_test.html");
-  content::NavigateToURLBlockUntilNavigationsComplete(shell(), test_url, 2);
+  NavigateToURLBlockUntilNavigationsComplete(shell(), test_url, 2);
 
   // Check that the page got the event it expected and that the provider
   // saw requests for adding and removing an observer.

content/browser/device_orientation/message_filter.cc

@@ -8,8 +8,6 @@
 #include "content/browser/device_orientation/provider.h"
 #include "content/public/browser/browser_thread.h"
 
-using content::BrowserThread;
-
 namespace content {
 
 MessageFilter::MessageFilter(DeviceData::Type device_data_type)

content/browser/device_orientation/message_filter.h

@@ -17,9 +17,9 @@ class ObserverDelegate;
 
 class Provider;
 
-class MessageFilter : public content::BrowserMessageFilter {
+class MessageFilter : public BrowserMessageFilter {
  public:
-  // content::BrowserMessageFilter implementation.
+  // BrowserMessageFilter implementation.
   virtual bool OnMessageReceived(const IPC::Message& message,
                                  bool* message_was_ok) OVERRIDE = 0;
 

content/browser/device_orientation/orientation_message_filter.cc

@@ -8,8 +8,6 @@
 #include "content/common/device_orientation_messages.h"
 #include "content/public/browser/browser_thread.h"
 
-using content::BrowserThread;
-
 namespace content {
 
 OrientationMessageFilter::OrientationMessageFilter()

content/browser/device_orientation/provider.cc

@@ -15,8 +15,6 @@
 #include "content/browser/device_orientation/data_fetcher_impl_android.h"
 #endif
 
-using content::BrowserThread;
-
 namespace content {
 
 Provider* Provider::GetInstance() {