Remove virtual destructors for several platform support classes

Source/core/platform/chromium/support/WebSourceInfo.cpp

Index: Source/core/platform/chromium/support/WebSourceInfo.cpp
diff --git a/Source/core/platform/chromium/support/WebSourceInfo.cpp b/Source/core/platform/chromium/support/WebSourceInfo.cpp
index 449e6d9eaf3d9e988a0f8dad023e56d12dd7355e..974474838eecd1140d5570cea652a23d91288e0c 100644
--- a/Source/core/platform/chromium/support/WebSourceInfo.cpp
+++ b/Source/core/platform/chromium/support/WebSourceInfo.cpp
@@ -36,7 +36,6 @@ namespace WebKit {
 class WebSourceInfoPrivate : public RefCounted<WebSourceInfoPrivate> {
 public:
     static PassRefPtr<WebSourceInfoPrivate> create(const WebString& id, WebSourceInfo::SourceKind, const WebString& label, WebSourceInfo::VideoFacingMode);
-    virtual ~WebSourceInfoPrivate();
 
     const WebString& id() const { return m_id; }
     WebSourceInfo::SourceKind kind() const { return m_kind; }
@@ -65,10 +64,6 @@ WebSourceInfoPrivate::WebSourceInfoPrivate(const WebString& id, WebSourceInfo::S
 {
 }
 
-WebSourceInfoPrivate::~WebSourceInfoPrivate()
-{
-}
-
 void WebSourceInfo::assign(const WebSourceInfo& other)
 {
     m_private = other.m_private;