[chromedriver] Add page loading strategy to capabilities

chrome/test/chromedriver/chrome/chrome.h

Index: chrome/test/chromedriver/chrome/chrome.h
diff --git a/chrome/test/chromedriver/chrome/chrome.h b/chrome/test/chromedriver/chrome/chrome.h
index a0957dfbaecc18b629e2adfe1d14a3747310fca4..2dd3e831111c5e8b80fbec4a4a6375dd971614d8 100644
--- a/chrome/test/chromedriver/chrome/chrome.h
+++ b/chrome/test/chromedriver/chrome/chrome.h
@@ -47,6 +47,10 @@ class Chrome {
   // actions can be performed on it.
   virtual bool HasTouchScreen() const = 0;
 
+  virtual std::string page_load_strategy() const = 0;
+
+  virtual void set_page_load_strategy(std::string strategy) = 0;
+
   // Quits Chrome.
   virtual Status Quit() = 0;
 };