Split content script injections into multiple tasks

third_party/WebKit/public/web/WebLocalFrame.h

Index: third_party/WebKit/public/web/WebLocalFrame.h
diff --git a/third_party/WebKit/public/web/WebLocalFrame.h b/third_party/WebKit/public/web/WebLocalFrame.h
index 7f51aa1d49449953e6a18a00f4001a19ff8fb31b..e35c275a008bea305a9070a19ebc032ec9ffc3db 100644
--- a/third_party/WebKit/public/web/WebLocalFrame.h
+++ b/third_party/WebKit/public/web/WebLocalFrame.h
@@ -249,6 +249,15 @@ class WebLocalFrame : public WebFrame {
                                         v8::Local<v8::Value> argv[],
                                         WebScriptExecutionCallback*) = 0;
 
+  enum ScriptExecutionType {
+    // Execute script synchronously if possible.

[haraken, 2017/03/02 03:54:33]

What do you mean by "if possible"?

[Kunihiko Sakamoto, 2017/03/06 09:11:06]

Since requestExecute* functions use SuspendableScriptExecutor internally,
scripts can be suspended and executed asynchronously.

Changed this comment to be a little more specific.

+    Synchronous,
+    // Execute script asynchronously.
+    Asynchronous,
+    // Execute script asynchronously, blocking the window.onload event.
+    AsyncBlockingOnload

[haraken, 2017/03/02 03:54:32]

AsynchronousBlockingOnload

[Kunihiko Sakamoto, 2017/03/06 09:11:06]

Done.

+  };
+
   // worldID must be > 0 (as 0 represents the main world).
   // worldID must be < EmbedderWorldIdLimit, high number used internally.
   virtual void requestExecuteScriptInIsolatedWorld(
@@ -256,6 +265,7 @@ class WebLocalFrame : public WebFrame {
       const WebScriptSource* sourceIn,
       unsigned numSources,
       bool userGesture,
+      ScriptExecutionType,
       WebScriptExecutionCallback*) = 0;
 
   // Associates an isolated world with human-readable name which is useful for