[Mac] Replace SetOverlayView with AllowOtherViews.

content/browser/renderer_host/render_widget_host_view_mac.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.
 
 #include "content/browser/renderer_host/render_widget_host_view_mac.h"
 
 #import <objc/runtime.h>
 #include <OpenGL/gl.h>
 #include <QuartzCore/QuartzCore.h>
 
@@ skipping 489 matching lines @@
 RenderWidgetHostViewMac::RenderWidgetHostViewMac(RenderWidgetHost* widget)
     : render_widget_host_(RenderWidgetHostImpl::From(widget)),
       text_input_type_(ui::TEXT_INPUT_TYPE_NONE),
       can_compose_inline_(true),
       browser_compositor_has_pending_paint_(false),
       browser_compositor_view_placeholder_(
           new BrowserCompositorViewPlaceholderMac),
       backing_store_scale_factor_(1),
       is_loading_(false),
       is_paused_for_resize_or_repaint_(false),
+      allow_pause_for_resize_or_repaint_(true),
       weak_factory_(this),
       fullscreen_parent_host_view_(NULL),
-      overlay_view_weak_factory_(this),
       software_frame_weak_ptr_factory_(this) {
   software_frame_manager_.reset(new SoftwareFrameManager(
       software_frame_weak_ptr_factory_.GetWeakPtr()));
   // |cocoa_view_| owns us and we will be deleted when |cocoa_view_|
   // goes away.  Since we autorelease it, our caller must put
   // |GetNativeView()| into the view hierarchy right after calling us.
   cocoa_view_ = [[[RenderWidgetHostViewCocoa alloc]
                   initWithRenderWidgetHostViewMac:this] autorelease];
 
   background_layer_.reset([[CALayer alloc] init]);
@@ skipping 32 matching lines @@
 
 void RenderWidgetHostViewMac::SetDelegate(
     NSObject<RenderWidgetHostViewMacDelegate>* delegate) {
   [cocoa_view_ setResponderDelegate:delegate];
 }
 
 void RenderWidgetHostViewMac::SetAllowOverlappingViews(bool overlapping) {
   // TODO(ccameron): Remove callers of this function.
 }
 
+void RenderWidgetHostViewMac::SetAllowPauseForResizeOrRepaint(bool allow) {
+  allow_pause_for_resize_or_repaint_ = allow;
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewMac, RenderWidgetHostView implementation:
 
 bool RenderWidgetHostViewMac::EnsureCompositedIOSurface() {
   // If the context or the IOSurface's context has had an error, re-build
   // everything from scratch.
   if (compositing_iosurface_context_ &&
       compositing_iosurface_context_->HasBeenPoisoned()) {
     LOG(ERROR) << "Failing EnsureCompositedIOSurface because "
                << "context was poisoned";
@@ skipping 1010 matching lines @@
   // Request that a new frame be generated and dirty the view.
   if (render_widget_host_)
     render_widget_host_->ScheduleComposite();
   [cocoa_view_ setNeedsDisplay:YES];
 
   // TODO(ccameron): It may be a good idea to request that the renderer recreate
   // its GL context as well, and fall back to software if this happens
   // repeatedly.
 }
 
-void RenderWidgetHostViewMac::SetOverlayView(
-    RenderWidgetHostViewMac* overlay, const gfx::Point& offset) {
-  if (overlay_view_)
-    overlay_view_->underlay_view_.reset();
-
-  overlay_view_ = overlay->overlay_view_weak_factory_.GetWeakPtr();
-  overlay_view_->underlay_view_ = overlay_view_weak_factory_.GetWeakPtr();
-}
-
-void RenderWidgetHostViewMac::RemoveOverlayView() {
-  if (overlay_view_) {
-    overlay_view_->underlay_view_.reset();
-    overlay_view_.reset();
-  }
-}
-
 bool RenderWidgetHostViewMac::GetLineBreakIndex(
     const std::vector<gfx::Rect>& bounds,
     const gfx::Range& range,
     size_t* line_break_point) {
   DCHECK(line_break_point);
   if (range.start() >= bounds.size() || range.is_reversed() || range.is_empty())
     return false;
 
   // We can't check line breaking completely from only rectangle array. Thus we
   // assume the line breaking as the next character's y offset is larger than
@@ skipping 591 matching lines @@
   RenderWidgetHostImpl::AcknowledgeBufferPresent(pending_swap_ack_->route_id,
                                                  pending_swap_ack_->gpu_host_id,
                                                  ack_params);
   pending_swap_ack_.reset();
 }
 
 void RenderWidgetHostViewMac::PauseForPendingResizeOrRepaintsAndDraw() {
   if (!render_widget_host_ || render_widget_host_->is_hidden())
     return;
 
-  // Pausing for the overlay/underlay view prevents the other one from receiving
-  // frames. This may lead to large delays, causing overlaps.
-  // See crbug.com/352020.
-  if (underlay_view_ || overlay_view_)
+  // Pausing for one view prevents others from receiving frames.
+  // This may lead to large delays, causing overlaps. See crbug.com/352020.
+  if (!allow_pause_for_resize_or_repaint_)
     return;
 
   // Ensure that all frames are acked before waiting for a frame to come in.
   // Note that we will draw a frame at the end of this function, so it is safe
   // to ack a never-drawn frame here.
   SendPendingSwapAck();
 
   // Wait for a frame of the right size to come in.
   is_paused_for_resize_or_repaint_ = true;
   render_widget_host_->PauseForPendingResizeOrRepaints();
@@ skipping 1745 matching lines @@
 
 // "-webkit-app-region: drag | no-drag" is implemented on Mac by excluding
 // regions that are not draggable. (See ControlRegionView in
 // native_app_window_cocoa.mm). This requires the render host view to be
 // draggable by default.
 - (BOOL)mouseDownCanMoveWindow {
   return YES;
 }
 
 @end