Remove TRACE_EVENT indirection through blink::Platform

sky/engine/platform/TestingPlatformSupport.cpp

Index: sky/engine/platform/TestingPlatformSupport.cpp
diff --git a/sky/engine/platform/TestingPlatformSupport.cpp b/sky/engine/platform/TestingPlatformSupport.cpp
index d16f3bbce3f8c6e19075236339b1707fb52364af..45a5c2be57e3bac9ebb18dc6d9f96f65af79d752 100644
--- a/sky/engine/platform/TestingPlatformSupport.cpp
+++ b/sky/engine/platform/TestingPlatformSupport.cpp
@@ -80,10 +80,4 @@ blink::WebDiscardableMemory* TestingPlatformSupport::allocateAndLockDiscardableM
     return !m_config.hasDiscardableMemorySupport ? 0 : new TestingDiscardableMemory(bytes);
 }
 
-const unsigned char* TestingPlatformSupport::getTraceCategoryEnabledFlag(const char* categoryName)
-{
-    static const unsigned char tracingIsDisabled = 0;
-    return &tracingIsDisabled;
-}
-
 } // namespace blink