Add unittest for OpenTypeSanitizer

Source/platform/TestingPlatformSupport.h

Index: Source/platform/TestingPlatformSupport.h
diff --git a/Source/platform/TestingPlatformSupport.h b/Source/platform/TestingPlatformSupport.h
index 69d8dd123f14a76e002e0d7d2ec30172c9efbe63..6220834676210732131b2d56f1112f6df4179a00 100644
--- a/Source/platform/TestingPlatformSupport.h
+++ b/Source/platform/TestingPlatformSupport.h
@@ -32,7 +32,10 @@
 #define TestingPlatformSupport_h
 
 #include "public/platform/Platform.h"
+#include "public/platform/WebData.h"
 #include "public/platform/WebDiscardableMemory.h"
+#include "public/platform/WebString.h"
+#include "public/platform/WebUnitTestSupport.h"
 #include "wtf/Vector.h"
 
 namespace WebCore {
@@ -52,7 +55,7 @@ private:
     bool m_isLocked;
 };
 
-class TestingPlatformSupport : public blink::Platform {
+class TestingPlatformSupport : public blink::Platform, public blink::WebUnitTestSupport {
 public:
     struct Config {
         Config() : hasDiscardableMemorySupport(false) { }
@@ -68,6 +71,11 @@ public:
     virtual blink::WebDiscardableMemory* allocateAndLockDiscardableMemory(size_t bytes) OVERRIDE;
     virtual void cryptographicallyRandomValues(unsigned char* buffer, size_t length) OVERRIDE;
     virtual const unsigned char* getTraceCategoryEnabledFlag(const char* categoryName) OVERRIDE;
+    virtual WebUnitTestSupport* unitTestSupport() OVERRIDE;
+
+    // blink::WebUnitTestSupport:
+    virtual blink::WebString webKitRootDir() OVERRIDE;
+    virtual blink::WebData readFromFile(const blink::WebString& path) OVERRIDE;
 
 private:
     const Config m_config;