Revert r135533.

webkit/glue/webcursor_aurax11.cc

Index: webkit/glue/webcursor_aurax11.cc
diff --git a/webkit/glue/webcursor_aurax11.cc b/webkit/glue/webcursor_aurax11.cc
index b3f698900688279d109a280aaeb58f4c3f235a95..fe221e29f80bd7b183adad5ee8ac74b8b6fca83d 100644
--- a/webkit/glue/webcursor_aurax11.cc
+++ b/webkit/glue/webcursor_aurax11.cc
@@ -10,6 +10,7 @@
 
 #include "base/logging.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebCursorInfo.h"
+#include "third_party/skia/include/core/SkUnPreMultiply.h"
 #include "ui/base/cursor/cursor.h"
 #include "ui/base/x/x11_util.h"
 
@@ -17,13 +18,35 @@ const ui::PlatformCursor WebCursor::GetPlatformCursor() {
   if (platform_cursor_)
     return platform_cursor_;
 
-  SkBitmap bitmap;
-  bitmap.setConfig(SkBitmap::kARGB_8888_Config,
-                   custom_size_.width(), custom_size_.height());
-  bitmap.allocPixels();
-  memcpy(bitmap.getAddr32(0, 0), custom_data_.data(), custom_data_.size());
+  XcursorImage* image =
+      XcursorImageCreate(custom_size_.width(), custom_size_.height());
+  image->xhot = hotspot_.x();
+  image->yhot = hotspot_.y();
+  uint32* pixels = image->pixels;
+
+  if (custom_size_.width() && custom_size_.height()) {
+    SkBitmap bitmap;
+    bitmap.setConfig(SkBitmap::kARGB_8888_Config,
+                     custom_size_.width(), custom_size_.height());
+    bitmap.allocPixels();
+    memcpy(bitmap.getAddr32(0, 0), custom_data_.data(), custom_data_.size());
+
+    bitmap.lockPixels();
+    int height = bitmap.height(), width = bitmap.width();
+    for (int y = 0, i = 0; y < height; y++) {
+      for (int x = 0; x < width; x++) {
+        uint32 pixel = bitmap.getAddr32(0, y)[x];
+        int alpha = SkColorGetA(pixel);
+        if (alpha != 0 && alpha != 255)
+          pixels[i] = SkUnPreMultiply::PMColorToColor(pixel);
+        else
+          pixels[i] = pixel;
+        ++i;
+      }
+    }
+    bitmap.unlockPixels();
+  }
 
-  XcursorImage* image = ui::SkBitmapToXcursorImage(&bitmap, hotspot_);
   platform_cursor_ = ui::CreateReffedCustomXCursor(image);
   return platform_cursor_;
 }