[Mac] Fix some leaks in tab drawing code.

chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm

Index: chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm
===================================================================
--- chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm	(revision 222257)
+++ chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm	(working copy)
@@ -166,7 +166,7 @@
   [NSGraphicsContext saveGraphicsState];
   for (ui::ScaleFactor scale_factor : ui::GetSupportedScaleFactors()) {
     float scale = GetScaleFactorScale(scale_factor);
-    NSBitmapImageRep *bmpImageRep = [[NSBitmapImageRep alloc]
+    NSBitmapImageRep *bmpImageRep = [[[NSBitmapImageRep alloc]
         initWithBitmapDataPlanes:NULL
                       pixelsWide:size.width * scale
                       pixelsHigh:size.height * scale
@@ -176,7 +176,7 @@
                         isPlanar:NO
                   colorSpaceName:NSDeviceRGBColorSpace
                      bytesPerRow:0
-                    bitsPerPixel:0];
+                    bitsPerPixel:0] autorelease];

[Nico, 2013/09/16 20:54:21]

!!

     [bmpImageRep setSize:size];
     [NSGraphicsContext setCurrentContext:
         [NSGraphicsContext graphicsContextWithBitmapImageRep:bmpImageRep]];