Remove --disable-core-animation flag

ui/base/cocoa/underlay_opengl_hosting_window.mm

 // 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.
 
 #import "ui/base/cocoa/underlay_opengl_hosting_window.h"
 
-#import <objc/runtime.h>
-
-#include "base/command_line.h"
 #include "base/logging.h"
-#include "base/mac/mac_util.h"
-#include "base/mac/scoped_nsautorelease_pool.h"
-#include "base/mac/scoped_nsobject.h"
-#include "ui/base/ui_base_switches.h"
-
-@interface NSWindow (UndocumentedAPI)
-// Normally, punching a hole in a window by painting a subview with a
-// transparent color causes the shadow for that area to also not be present.
-// That feature is "content has shadow", which means that shadows are effective
-// even in the content area of the window. If, however, "content has shadow" is
-// turned off, then the transparent area of the content casts a shadow. The one
-// tricky part is that even if "content has shadow" is turned off, "the content"
-// is defined as being the scanline from the leftmost opaque part to the
-// rightmost opaque part.  Therefore, to force the entire window to have a
-// shadow, make sure that for the entire content region, there is an opaque area
-// on the right and left edge of the window.
-- (void)_setContentHasShadow:(BOOL)shadow;
-@end
-
-@interface OpaqueView : NSView
-@end
-
-namespace {
-
-bool CoreAnimationIsEnabled() {
-  static bool is_enabled = !CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kDisableCoreAnimation);
-  return is_enabled;
-}
-
-NSComparisonResult OpaqueViewsOnTop(id view1, id view2, void* context) {
-  BOOL view_1_is_opaque_view = [view1 isKindOfClass:[OpaqueView class]];
-  BOOL view_2_is_opaque_view = [view2 isKindOfClass:[OpaqueView class]];
-  if (view_1_is_opaque_view && view_2_is_opaque_view)
-    return NSOrderedSame;
-  if (view_1_is_opaque_view)
-    return NSOrderedDescending;
-  if (view_2_is_opaque_view)
-    return NSOrderedAscending;
-  return NSOrderedSame;
-}
-
-}  // namespace
-
-@implementation OpaqueView
-
-- (void)drawRect:(NSRect)r {
-  [[NSColor blackColor] set];
-  NSRectFill(r);
-}
-
-- (void)resetCursorRects {
-  // When a view is moved relative to its peers, its cursor rects are reset.
-  // (This is an undocumented side-effect.) At that time, verify that any
-  // OpaqueViews are z-ordered in the front, and enforce it if need be.
-
-  NSView* rootView = [self superview];
-  DCHECK_EQ((NSView*)nil, [rootView superview]);
-  NSArray* subviews = [rootView subviews];
-
-  // If a window has any opaques, it will have exactly two.
-  DCHECK_EQ(2U, [[subviews indexesOfObjectsPassingTest:
-      ^(id el, NSUInteger i, BOOL *stop) {
-        return [el isKindOfClass:[OpaqueView class]];
-      }] count]);
-
-  NSUInteger count = [subviews count];
-  if (count < 2)
-    return;
-
-  if (![[subviews objectAtIndex:count - 1] isKindOfClass:[OpaqueView class]] ||
-      ![[subviews objectAtIndex:count - 2] isKindOfClass:[OpaqueView class]]) {
-    // Do not sort the subviews array here and call -[NSView setSubviews:] as
-    // that causes a crash on 10.6.
-    [rootView sortSubviewsUsingFunction:OpaqueViewsOnTop context:NULL];
-  }
-}
-
-@end
 
 @implementation UnderlayOpenGLHostingWindow
 
 - (id)initWithContentRect:(NSRect)contentRect
                 styleMask:(NSUInteger)windowStyle
                   backing:(NSBackingStoreType)bufferingType
                     defer:(BOOL)deferCreation {
   // It is invalid to create windows with zero width or height. It screws things
   // up royally:
   // - It causes console spew: <http://crbug.com/78973>
   // - It breaks Expose: <http://sourceforge.net/projects/heat-meteo/forums/forum/268087/topic/4582610>
   //
   // This is a banned practice
   // <http://www.chromium.org/developers/coding-style/cocoa-dos-and-donts>. Do
   // not do this. Use kWindowSizeDeterminedLater in
   // ui/base/cocoa/window_size_constants.h instead.
   //
   // (This is checked here because UnderlayOpenGLHostingWindow is the base of
   // most Chromium windows, not because this is related to its functionality.)
   DCHECK(!NSIsEmptyRect(contentRect));
-  if ((self = [super initWithContentRect:contentRect
-                               styleMask:windowStyle
-                                 backing:bufferingType
-                                   defer:deferCreation])) {
-    if (CoreAnimationIsEnabled()) {
-      // If CoreAnimation is used, then the hole punching technique won't be
-      // used. Bail now and don't play any special games with the shadow.
-      // TODO(avi): Rip all this shadow code out once CoreAnimation can't be
-      // turned off. http://crbug.com/336554
-      return self;
-    }
-
-    // OpenGL-accelerated content works by punching holes in windows. Therefore
-    // all windows hosting OpenGL content must not be opaque.
-    [self setOpaque:NO];
-
-    if (windowStyle & NSTitledWindowMask) {
-      // Only fiddle with shadows if the window is a proper window with a
-      // title bar and all.
-      [self _setContentHasShadow:NO];
-
-      NSView* rootView = [[self contentView] superview];
-      const NSRect rootBounds = [rootView bounds];
-
-      // On 10.7/8, the bottom corners of the window are rounded by magic at a
-      // deeper level than the NSThemeFrame, so it is OK to have the opaques
-      // go all the way to the bottom.
-      const CGFloat kTopEdgeInset = 16;
-      const CGFloat kAlphaValueJustOpaqueEnough = 0.005;
-
-      base::scoped_nsobject<NSView> leftOpaque([[OpaqueView alloc]
-          initWithFrame:NSMakeRect(NSMinX(rootBounds),
-                                   NSMinY(rootBounds),
-                                   1,
-                                   NSHeight(rootBounds) - kTopEdgeInset)]);
-      [leftOpaque setAutoresizingMask:NSViewMaxXMargin |
-                                      NSViewHeightSizable];
-      [leftOpaque setAlphaValue:kAlphaValueJustOpaqueEnough];
-      [rootView addSubview:leftOpaque];
-
-      base::scoped_nsobject<NSView> rightOpaque([[OpaqueView alloc]
-          initWithFrame:NSMakeRect(NSMaxX(rootBounds) - 1,
-                                   NSMinY(rootBounds),
-                                   1,
-                                   NSHeight(rootBounds) - kTopEdgeInset)]);
-      [rightOpaque setAutoresizingMask:NSViewMinXMargin |
-                                       NSViewHeightSizable];
-      [rightOpaque setAlphaValue:kAlphaValueJustOpaqueEnough];
-      [rootView addSubview:rightOpaque];
-    }
-  }
-
+  self = [super initWithContentRect:contentRect
+                          styleMask:windowStyle
+                            backing:bufferingType
+                             defer:deferCreation];
   return self;
 }
 
 @end