Revert of [devtools] Support different encodings for Page.CaptureScreenshot.

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 5ebaa0ca872a9711b6addf920125eb3ad28db1a4..fdb1ac59ae589c4e99aa1d49dbddad9b305024f9 100644
--- a/content/browser/devtools/protocol/page_handler.h
+++ b/content/browser/devtools/protocol/page_handler.h
@@ -19,10 +19,6 @@
 #include "content/public/browser/readback_types.h"
 
 class SkBitmap;
-
-namespace gfx {
-class Image;
-}  // namespace gfx
 
 namespace content {
 
@@ -69,8 +65,6 @@
   Response NavigateToHistoryEntry(int entry_id) override;
 
   void CaptureScreenshot(
-      Maybe<std::string> format,
-      Maybe<int> quality,
       std::unique_ptr<CaptureScreenshotCallback> callback) override;
   Response StartScreencast(Maybe<std::string> format,
                            Maybe<int> quality,
@@ -97,8 +91,6 @@
   void NavigationRequested(const PageNavigationThrottle* throttle);
 
  private:
-  enum EncodingFormat { PNG, JPEG };
-
   WebContentsImpl* GetWebContents();
   void NotifyScreencastVisibility(bool visible);
   void InnerSwapCompositorFrame();
@@ -109,10 +101,10 @@
                               const base::Time& timestamp,
                               const std::string& data);
 
-  void ScreenshotCaptured(std::unique_ptr<CaptureScreenshotCallback> callback,
-                          const std::string& format,
-                          int quality,
-                          const gfx::Image& image);
+  void ScreenshotCaptured(
+      std::unique_ptr<CaptureScreenshotCallback> callback,
+      const unsigned char* png_data,
+      size_t png_size);
 
   void OnColorPicked(int r, int g, int b, int a);