[Blob] Dependencies for blob storage testing

public/platform/WebThreadSafeData.h

Index: public/platform/WebThreadSafeData.h
diff --git a/public/platform/WebThreadSafeData.h b/public/platform/WebThreadSafeData.h
index 2b9abac517bc0b52f230265e301f9d91c7040bed..d741f3f46135498f8455cfe84cfde68903c5a904 100644
--- a/public/platform/WebThreadSafeData.h
+++ b/public/platform/WebThreadSafeData.h
@@ -47,6 +47,8 @@ class RawData;
 class WebThreadSafeData {
 public:
     WebThreadSafeData() { }
+    BLINK_PLATFORM_EXPORT WebThreadSafeData(const char* data, size_t length);
+
     ~WebThreadSafeData() { reset(); }
 
     BLINK_PLATFORM_EXPORT void assign(const WebThreadSafeData&);
@@ -57,6 +59,9 @@ public:
 
     bool isEmpty() const { return !size(); }
 
+    BLINK_PLATFORM_EXPORT WebThreadSafeData(const WebThreadSafeData&);
+    BLINK_PLATFORM_EXPORT WebThreadSafeData& operator=(const WebThreadSafeData&);
+
 #if INSIDE_BLINK
     BLINK_PLATFORM_EXPORT WebThreadSafeData(const WTF::PassRefPtr<RawData>&);
     BLINK_PLATFORM_EXPORT WebThreadSafeData& operator=(const WTF::PassRefPtr<RawData>&);