Rename FeatureObserver to UseCounter to make clear that all it stores are usage counts.

Source/bindings/tests/results/V8TestObj.cpp

Index: Source/bindings/tests/results/V8TestObj.cpp
diff --git a/Source/bindings/tests/results/V8TestObj.cpp b/Source/bindings/tests/results/V8TestObj.cpp
index 353dedb38d587eee25abef1efadc24c446a37488..4cb8920a2fb95a74cafc2638e0cff438737fff8f 100644
--- a/Source/bindings/tests/results/V8TestObj.cpp
+++ b/Source/bindings/tests/results/V8TestObj.cpp
@@ -26,7 +26,7 @@
 #include "DOMStringList.h"
 #include "Dictionary.h"
 #include "ExceptionCode.h"
-#include "FeatureObserver.h"
+#include "UseCounter.h"
 #include "Frame.h"
 #include "HTMLNames.h"
 #include "RuntimeEnabledFeatures.h"
@@ -364,7 +364,7 @@ static v8::Handle<v8::Value> testObjAttrAttrGetter(v8::Local<v8::String> name, c
 
 static v8::Handle<v8::Value> testObjAttrAttrGetterCallback(v8::Local<v8::String> name, const v8::AccessorInfo& info)
 {
-    FeatureObserver::observe(activeDOMWindow(BindingState::instance()), FeatureObserver::TestFeature);
+    UseCounter::observe(activeDOMWindow(BindingState::instance()), UseCounter::TestFeature);
     return TestObjV8Internal::testObjAttrAttrGetter(name, info);
 }
 
@@ -378,7 +378,7 @@ static void testObjAttrAttrSetter(v8::Local<v8::String> name, v8::Local<v8::Valu
 
 static void testObjAttrAttrSetterCallback(v8::Local<v8::String> name, v8::Local<v8::Value> value, const v8::AccessorInfo& info)
 {
-    FeatureObserver::observe(activeDOMWindow(BindingState::instance()), FeatureObserver::TestFeature);
+    UseCounter::observe(activeDOMWindow(BindingState::instance()), UseCounter::TestFeature);
     TestObjV8Internal::testObjAttrAttrSetter(name, value, info);
 }
 
@@ -1917,7 +1917,7 @@ static v8::Handle<v8::Value> objMethodMethod(const v8::Arguments& args)
 
 static v8::Handle<v8::Value> objMethodMethodCallback(const v8::Arguments& args)
 {
-    FeatureObserver::observe(activeDOMWindow(BindingState::instance()), FeatureObserver::TestFeature);
+    UseCounter::observe(activeDOMWindow(BindingState::instance()), UseCounter::TestFeature);
     return TestObjV8Internal::objMethodMethod(args);
 }
 
@@ -2066,7 +2066,7 @@ static v8::Handle<v8::Value> methodWithExceptionMethodCallback(const v8::Argumen
 
 static v8::Handle<v8::Value> customMethodMethodCallback(const v8::Arguments& args)
 {
-    FeatureObserver::observe(activeDOMWindow(BindingState::instance()), FeatureObserver::CustomTestFeature);
+    UseCounter::observe(activeDOMWindow(BindingState::instance()), UseCounter::CustomTestFeature);
     return V8TestObj::customMethodMethodCustom(args);
 }