Fix GrapWindowSnapshot typo

ui/snapshot/snapshot.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_SNAPSHOT_SNAPSHOT_H_
 #define UI_SNAPSHOT_SNAPSHOT_H_
 
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "base/memory/ref_counted.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/snapshot/snapshot_export.h"
 
 namespace base {
 class TaskRunner;
 }
 
 namespace gfx {
 class Rect;
 class Image;
 class Size;
 }
 
 namespace ui {
 
 // Grabs a snapshot of the window/view. No security checks are done. This is
 // intended to be used for debugging purposes where no BrowserProcess instance
 // is available (ie. tests). This function is synchronous, so it should NOT be
-// used in a result of user action. Use asynchronous GrapWindowSnapshotAsync()
+// used in a result of user action. Use asynchronous GrabWindowSnapshotAsync()
 // instead.
 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,
     std::vector<unsigned char>* png_representation,
     const gfx::Rect& snapshot_bounds);
 
-// GrapWindowSnapshotAsync() copies snapshot of |source_rect| from window and
+// GrabWindowSnapshotAsync() copies snapshot of |source_rect| from window and
 // scales it to |target_size| asynchronously.
 typedef base::Callback<void(const gfx::Image& snapshot)>
-    GrapWindowSnapshotAsyncCallback;
-SNAPSHOT_EXPORT void GrapWindowSnapshotAsync(
+    GrabWindowSnapshotAsyncCallback;
+SNAPSHOT_EXPORT void GrabWindowSnapshotAsync(
     gfx::NativeWindow window,
     const gfx::Rect& source_rect,
     const gfx::Size& target_size,
     scoped_refptr<base::TaskRunner> background_task_runner,
-    const GrapWindowSnapshotAsyncCallback& callback);
+    const GrabWindowSnapshotAsyncCallback& callback);
 
 }  // namespace ui
 
 #endif  // UI_SNAPSHOT_SNAPSHOT_H_