Make classes and structures in core/inspector fast-allocated.

Source/core/inspector/v8/V8DebuggerClient.h

Index: Source/core/inspector/v8/V8DebuggerClient.h
diff --git a/Source/core/inspector/v8/V8DebuggerClient.h b/Source/core/inspector/v8/V8DebuggerClient.h
index 0bd43771ba902243197af54e00ae38c02c18beca..ef14c3fe22abdc2f080fda03ef49f720fba507a6 100644
--- a/Source/core/inspector/v8/V8DebuggerClient.h
+++ b/Source/core/inspector/v8/V8DebuggerClient.h
@@ -6,6 +6,7 @@
 #define V8DebuggerClient_h
 
 #include "core/CoreExport.h"
+#include "wtf/FastAllocBase.h"
 
 #include <v8.h>
 
@@ -14,6 +15,7 @@ namespace blink {
 class V8DebuggerListener;
 
 class CORE_EXPORT V8DebuggerClient {
+    WTF_MAKE_FAST_ALLOCATED(V8DebuggerClient);
 public:
     virtual ~V8DebuggerClient() { }
     virtual v8::Local<v8::Object> compileDebuggerScript() = 0;