[ChromeDriver] Send DOM.getDocument after each DOM.documentUpdated.

chrome/test/chromedriver/dom_tracker.h

Index: chrome/test/chromedriver/dom_tracker.h
diff --git a/chrome/test/chromedriver/dom_tracker.h b/chrome/test/chromedriver/dom_tracker.h
index 3de98853f9d1b8420f0d9d6c5de7c63b9af17014..811eb2bd86dc727272d4f3cd8618df66493c6f86 100644
--- a/chrome/test/chromedriver/dom_tracker.h
+++ b/chrome/test/chromedriver/dom_tracker.h
@@ -10,6 +10,7 @@
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
+#include "chrome/test/chromedriver/devtools_client.h"
 #include "chrome/test/chromedriver/devtools_event_listener.h"
 
 namespace base {
@@ -22,9 +23,10 @@ class Status;
 // Tracks the state of the DOM and execution context creation.
 class DomTracker : public DevToolsEventListener {
  public:
-  DomTracker();
+  explicit DomTracker(DevToolsClient* client);
   virtual ~DomTracker();
 
+  Status Init();
   Status GetFrameIdForNode(int node_id, std::string* frame_id);
 
   // Overridden from DevToolsEventListener:
@@ -32,6 +34,7 @@ class DomTracker : public DevToolsEventListener {
                        const base::DictionaryValue& params) OVERRIDE;
 
  private:
+  DevToolsClient* client_;
   bool ProcessNodeList(const base::Value* nodes);
   bool ProcessNode(const base::Value* node);