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

ui/snapshot/snapshot.h

Index: ui/snapshot/snapshot.h
diff --git a/ui/snapshot/snapshot.h b/ui/snapshot/snapshot.h
index 3c83a929868843618bd72e43de9e5c9c662d7452..4b2733c1536b846fa85d51cd25dc3a6b2ce703a7 100644
--- a/ui/snapshot/snapshot.h
+++ b/ui/snapshot/snapshot.h
@@ -31,13 +31,16 @@
 // used in a result of user action. Support for async vs synchronous
 // GrabWindowSnapshot differs by platform.  To be most general, use the
 // synchronous function first and if it returns false call the async one.
-SNAPSHOT_EXPORT bool GrabWindowSnapshot(gfx::NativeWindow window,
-                                        const gfx::Rect& snapshot_bounds,
-                                        gfx::Image* image);
+SNAPSHOT_EXPORT bool GrabWindowSnapshot(
+    gfx::NativeWindow window,
+    std::vector<unsigned char>* png_representation,
+    const gfx::Rect& snapshot_bounds);
 
-SNAPSHOT_EXPORT bool GrabViewSnapshot(gfx::NativeView view,
-                                      const gfx::Rect& snapshot_bounds,
-                                      gfx::Image* image);
+SNAPSHOT_EXPORT bool GrabViewSnapshot(
+    gfx::NativeView view,
+    std::vector<unsigned char>* png_representation,
+    const gfx::Rect& snapshot_bounds);
+
 
 // These functions take a snapshot of |source_rect|, specified in layer space
 // coordinates (DIP for desktop, physical pixels for Android), and scale the
@@ -51,20 +54,15 @@
     scoped_refptr<base::TaskRunner> background_task_runner,
     const GrabWindowSnapshotAsyncCallback& callback);
 
+typedef base::Callback<void(scoped_refptr<base::RefCountedBytes> png_data)>
+    GrabWindowSnapshotAsyncPNGCallback;
 SNAPSHOT_EXPORT void GrabWindowSnapshotAsync(
     gfx::NativeWindow window,
     const gfx::Rect& source_rect,
-    const GrabWindowSnapshotAsyncCallback& callback);
-
+    scoped_refptr<base::TaskRunner> background_task_runner,
+    const GrabWindowSnapshotAsyncPNGCallback& callback);
 SNAPSHOT_EXPORT void GrabViewSnapshotAsync(
     gfx::NativeView view,
-    const gfx::Rect& source_rect,
-    const GrabWindowSnapshotAsyncCallback& callback);
-
-typedef base::Callback<void(scoped_refptr<base::RefCountedMemory> png_data)>
-    GrabWindowSnapshotAsyncPNGCallback;
-SNAPSHOT_EXPORT void GrabWindowSnapshotAsyncPNG(
-    gfx::NativeWindow window,
     const gfx::Rect& source_rect,
     scoped_refptr<base::TaskRunner> background_task_runner,
     const GrabWindowSnapshotAsyncPNGCallback& callback);