Cleanup namespace usage in public/platform/{Web[P-W]*,linux/*}.h

public/platform/WebSchedulerProxy.h

Index: public/platform/WebSchedulerProxy.h
diff --git a/public/platform/WebSchedulerProxy.h b/public/platform/WebSchedulerProxy.h
index eee2cf53a7a5b76e8c17cc5f8fb51d22e57adf70..f59ff991caf0d8e6e2a9fcb8f6e0cd6785a9632b 100644
--- a/public/platform/WebSchedulerProxy.h
+++ b/public/platform/WebSchedulerProxy.h
@@ -8,11 +8,8 @@
 #include "WebThread.h"
 
 namespace blink {
-class Scheduler;
-}
-
-namespace blink {
 
+class Scheduler;
 class WebTraceLocation;
 
 // This class is used to submit tasks to Blink's main thread scheduler.
@@ -33,7 +30,7 @@ public:
 private:
     WebSchedulerProxy();
 
-    blink::Scheduler* m_scheduler;
+    Scheduler* m_scheduler;
 };
 
 } // namespace blink