Apply script preprocessor to Web page scripts only.

Source/bindings/v8/ScriptController.h

Index: Source/bindings/v8/ScriptController.h
diff --git a/Source/bindings/v8/ScriptController.h b/Source/bindings/v8/ScriptController.h
index e4076667a027becd84500cbb37c74e2e8a3352a3..8437070bbaafa2b9da7acc18b062ca459b346f08 100644
--- a/Source/bindings/v8/ScriptController.h
+++ b/Source/bindings/v8/ScriptController.h
@@ -64,6 +64,10 @@ enum ReasonForCallingCanExecuteScripts {
     NotAboutToExecuteScript
 };
 
+enum InternalIsoloatedWorldIds {
+    ScriptPreprocessorIsolatedWorldId = 10001,

[abarth-chromium, 2013/07/08 23:57:08]

Why is it safe to steal this world ID?  It's valid for the embedder to use this
world API itself, which would cause a collision.

[johnjbarton, 2013/07/09 22:44:54]

It is not absolutely safe, only relatively safe given that the only known
embedder using world ids starts at 1 and increments by 1 in a session unlikely
to include thousands of worlds.

Let's discuss how to solve this on:
https://code.google.com/p/chromium/issues/detail?id=258504

+};
+
 class ScriptController {
 public:
     ScriptController(Frame*);
@@ -157,6 +161,13 @@ public:
     static void registerExtensionIfNeeded(v8::Extension*);
     static V8Extensions& registeredExtensions();
 
+    // Empty string disables preprocessing.

[abarth-chromium, 2013/07/08 23:57:08]

Rather than using in-band signaling, I'd recommend a separate
clearScriptPreprocessor() function.

[johnjbarton, 2013/07/09 22:44:54]

Done.

+    void setScriptPreprocessor(const String& preprocessorSource);
+    // Source to Source processing iff debugger enabled and preprocessor loaded.
+    String preprocess(const String& scriptSource, const String& scriptName);
+    bool hasScriptPreprocessor();
+    bool isScriptPreprocessing();

[abarth-chromium, 2013/07/08 23:57:08]

isPreprocessingScript

[johnjbarton, 2013/07/09 22:44:54]

Done.

+
     bool setContextDebugId(int);
     static int contextDebugId(v8::Handle<v8::Context>);
 
@@ -180,6 +191,10 @@ private:
 
     typedef HashSet<NPP> PluginInstances;
     PluginInstances m_pluginNPPs;
+
+    class ScriptPreprocessor;
+    String m_preprocessorSource;
+    OwnPtr<ScriptPreprocessor> m_scriptPreprocessor;
 };
 
 } // namespace WebCore