Fixes memory leak

ui/gfx/image/image_mac_unittest.mm

Index: ui/gfx/image/image_mac_unittest.mm
diff --git a/ui/gfx/image/image_mac_unittest.mm b/ui/gfx/image/image_mac_unittest.mm
index 924cebd048f23d48100fb35665381d117140b76c..ba2e47db28a24cd25bab15e01e7fd29deb7ddd45 100644
--- a/ui/gfx/image/image_mac_unittest.mm
+++ b/ui/gfx/image/image_mac_unittest.mm
@@ -18,7 +18,7 @@ class ImageMacTest : public testing::Test {
  public:
   void CreateBitmapImageRep(int width, int height,

[Nico, 2012/06/12 15:31:50]

nit: "Create" suggests that the caller is responsible for releasing the result,
maybe rename to just "BitmapImageRep()"?

                             NSBitmapImageRep** image_rep) {
-    *image_rep = [[NSBitmapImageRep alloc]
+    *image_rep = [[[NSBitmapImageRep alloc]
         initWithBitmapDataPlanes:NULL
                       pixelsWide:width
                       pixelsHigh:height
@@ -29,7 +29,8 @@ class ImageMacTest : public testing::Test {
                   colorSpaceName:NSDeviceRGBColorSpace
                     bitmapFormat:0
                      bytesPerRow:0
-                    bitsPerPixel:0];
+                    bitsPerPixel:0]
+                 autorelease];
   }
 };