Blink: Replace all "plug-in" with "plugin".

Source/bindings/core/v8/V8Binding.cpp

Index: Source/bindings/core/v8/V8Binding.cpp
diff --git a/Source/bindings/core/v8/V8Binding.cpp b/Source/bindings/core/v8/V8Binding.cpp
index 883e3ceac5de1c2ecf8dc772d244f60e1a86bc17..e5377e7df74ea72b9e5e176c68cb269760939287 100644
--- a/Source/bindings/core/v8/V8Binding.cpp
+++ b/Source/bindings/core/v8/V8Binding.cpp
@@ -677,7 +677,7 @@ LocalDOMWindow* callingDOMWindow(v8::Isolate* isolate)
 {
     v8::Handle<v8::Context> context = isolate->GetCallingContext();
     if (context.IsEmpty()) {
-        // Unfortunately, when processing script from a plug-in, we might not
+        // Unfortunately, when processing script from a plugin, we might not
         // have a calling context. In those cases, we fall back to the
         // entered context.
         context = isolate->GetEnteredContext();
@@ -709,7 +709,7 @@ ExecutionContext* callingExecutionContext(v8::Isolate* isolate)
 {
     v8::Handle<v8::Context> context = isolate->GetCallingContext();
     if (context.IsEmpty()) {
-        // Unfortunately, when processing script from a plug-in, we might not
+        // Unfortunately, when processing script from a plugin, we might not
         // have a calling context. In those cases, we fall back to the
         // entered context.
         context = isolate->GetEnteredContext();