[DevTools] Filter any messages from previous sessions in DevToolsAgentHostImpl

content/browser/devtools/protocol/page_handler.h

Index: content/browser/devtools/protocol/page_handler.h
diff --git a/content/browser/devtools/protocol/page_handler.h b/content/browser/devtools/protocol/page_handler.h
index f2c2ded4dbac15306932893772f873ea98f2354f..5ce226f733ee2db42b33c85d2e43156b71ac2652 100644
--- a/content/browser/devtools/protocol/page_handler.h
+++ b/content/browser/devtools/protocol/page_handler.h
@@ -66,7 +66,7 @@ class PageHandler : public NotificationObserver {
 
   Response NavigateToHistoryEntry(int entry_id);
 
-  Response CaptureScreenshot(DevToolsCommandId command_id);
+  Response CaptureScreenshot(int session_id, DevToolsCommandId command_id);
 
   Response CanScreencast(bool* result);
   Response StartScreencast(const std::string* format,
@@ -94,10 +94,10 @@ class PageHandler : public NotificationObserver {
                               const base::Time& timestamp,
                               const std::string& data);
 
-  void ScreenshotCaptured(
-      DevToolsCommandId command_id,
-      const unsigned char* png_data,
-      size_t png_size);
+  void ScreenshotCaptured(int session_id,
+                          DevToolsCommandId command_id,
+                          const unsigned char* png_data,
+                          size_t png_size);
 
   void OnColorPicked(int r, int g, int b, int a);