Cleanup namespace usage in Source/core/modules/[battery/* to indexeddb/*]

Source/modules/encryptedmedia/MediaKeysController.h

Index: Source/modules/encryptedmedia/MediaKeysController.h
diff --git a/Source/modules/encryptedmedia/MediaKeysController.h b/Source/modules/encryptedmedia/MediaKeysController.h
index 540ff3457bfba7ef55dbb57482f9c891ad83fde9..e733554b764c9f9076688dd2c20a5e35852fc736 100644
--- a/Source/modules/encryptedmedia/MediaKeysController.h
+++ b/Source/modules/encryptedmedia/MediaKeysController.h
@@ -9,18 +9,15 @@
 #include "wtf/PassOwnPtr.h"
 
 namespace blink {
-class WebContentDecryptionModule;
-}
-
-namespace blink {
 
 class ExecutionContext;
 class MediaKeysClient;
+class WebContentDecryptionModule;
 
 class MediaKeysController FINAL : public NoBaseWillBeGarbageCollected<MediaKeysController>, public WillBeHeapSupplement<Page> {
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(MediaKeysController);
 public:
-    PassOwnPtr<blink::WebContentDecryptionModule> createContentDecryptionModule(ExecutionContext*, const String& keySystem);
+    PassOwnPtr<WebContentDecryptionModule> createContentDecryptionModule(ExecutionContext*, const String& keySystem);
 
     static void provideMediaKeysTo(Page&, MediaKeysClient*);
     static MediaKeysController* from(Page* page) { return static_cast<MediaKeysController*>(WillBeHeapSupplement<Page>::from(page, supplementName())); }