Rename WebCore namespace to blink in Platform

Source/platform/HostWindow.h

Index: Source/platform/HostWindow.h
diff --git a/Source/platform/HostWindow.h b/Source/platform/HostWindow.h
index 7744e3f1f5bc36b54b8dd2326c94fb24789c8884..c6caa650b66932dcd981ea56150d30099cb29f8d 100644
--- a/Source/platform/HostWindow.h
+++ b/Source/platform/HostWindow.h
@@ -34,7 +34,7 @@ namespace blink {
 struct WebScreenInfo;
 }
 
-namespace WebCore {
+namespace blink {
 class Cursor;
 class IntPoint;
 class IntRect;
@@ -62,6 +62,6 @@ public:
     virtual void scheduleAnimation() = 0;
 };
 
-} // namespace WebCore
+} // namespace blink
 
 #endif // HostWindow_h