Cleanup namespace usage in public/web/Web[N-Z]*.h.

public/web/WebTextAreaElement.h

Index: public/web/WebTextAreaElement.h
diff --git a/public/web/WebTextAreaElement.h b/public/web/WebTextAreaElement.h
index ed324f7f2eb9481d52f061565e2d2c5f5ae372de..04b5e736808085ab3ed9e0c88bc003862cd39f88 100644
--- a/public/web/WebTextAreaElement.h
+++ b/public/web/WebTextAreaElement.h
@@ -33,12 +33,10 @@
 
 #include "WebFormControlElement.h"
 
-#if BLINK_IMPLEMENTATION
-namespace blink { class HTMLTextAreaElement; }
-#endif
-
 namespace blink {
 
+class HTMLTextAreaElement;
+
 // Provides access to some properties of a DOM textarea element node.
 class WebTextAreaElement : public WebFormControlElement {
 public:
@@ -53,9 +51,9 @@ public:
     void assign(const WebTextAreaElement& element) { WebFormControlElement::assign(element); }
 
 #if BLINK_IMPLEMENTATION
-    WebTextAreaElement(const PassRefPtrWillBeRawPtr<blink::HTMLTextAreaElement>&);
-    WebTextAreaElement& operator=(const PassRefPtrWillBeRawPtr<blink::HTMLTextAreaElement>&);
-    operator PassRefPtrWillBeRawPtr<blink::HTMLTextAreaElement>() const;
+    WebTextAreaElement(const PassRefPtrWillBeRawPtr<HTMLTextAreaElement>&);
+    WebTextAreaElement& operator=(const PassRefPtrWillBeRawPtr<HTMLTextAreaElement>&);
+    operator PassRefPtrWillBeRawPtr<HTMLTextAreaElement>() const;
 #endif
 };