Reverts recent changes to StatusBubbleMac.

Recent cleanup and performance changes caused a regression in the fullscreen
transition animation, leading to this revert.

This reverts commit 9ec18e41.
This reverts commit b62daf58.
This reverts commit 014fd0a1.

TBR=erikchen@chromium.org
BUG=470180,464754,454502
TEST=None

Review URL: https://codereview.chromium.org/1042633003

Cr-Commit-Position: refs/heads/master@{#322728}

chrome/browser/ui/cocoa/status_bubble_mac.mm

@@ -8,7 +8,6 @@
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
-#include "base/debug/stack_trace.h"
 #include "base/mac/mac_util.h"
 #include "base/mac/scoped_block.h"
 #include "base/mac/sdk_forward_declarations.h"
@@ -143,32 +142,6 @@ const CGFloat kExpansionDurationSeconds = 0.125;
 
 @end
 
-// Mac implementation of the status bubble.
-//
-// Child windows interact with Spaces in interesting ways, so this code has to
-// follow these rules:
-//
-// 1) NSWindows cannot have zero size.  At times when the status bubble window
-//    has no specific size (for example, when hidden), its size is set to
-//    ui::kWindowSizeDeterminedLater.
-//
-// 2) Child window frames are in the coordinate space of the screen, not of the
-//    parent window.  If a child window has its origin at (0, 0), Spaces will
-//    position it in the corner of the screen but group it with the parent
-//    window in Spaces.  This causes Chrome windows to have a large (mostly
-//    blank) area in Spaces.  To avoid this, child windows always have their
-//    origin set to the lower-left corner of the window.
-//
-// 3) Detached child windows may show up as top-level windows in Spaces.  To
-//    avoid this, once the status bubble is Attach()ed to the parent, it is
-//    never detached (except in rare cases when reparenting to a fullscreen
-//    window).
-//
-// 4) To avoid unnecessary redraws, if a bubble is in the kBubbleHidden state,
-//    its size is always set to ui::kWindowSizeDeterminedLater.  The proper
-//    width for the current URL or status text is not calculated until the
-//    bubble leaves the kBubbleHidden state.
-
 StatusBubbleMac::StatusBubbleMac(NSWindow* parent, id delegate)
     : parent_(parent),
       delegate_(delegate),
@@ -204,25 +177,16 @@ void StatusBubbleMac::SetURL(const GURL& url, const std::string& languages) {
   url_ = url;
   languages_ = languages;
 
-  CGFloat bubble_width = NSWidth([window_ frame]);
+  NSRect frame = [window_ frame];
+
+  // Reset frame size when bubble is hidden.
   if (state_ == kBubbleHidden) {
-    // TODO(rohitrao): The window size is expected to be (1,1) whenever the
-    // window is hidden, but the GPU bots are hitting cases where this is not
-    // true.  Instead of enforcing this invariant with a DCHECK, add temporary
-    // logging to try and debug it and fix up the window size if needed.
-    // This logging is temporary and should be removed: crbug.com/467998
-    NSRect frame = [window_ frame];
-    if (!CGSizeEqualToSize(frame.size, ui::kWindowSizeDeterminedLater.size)) {
-      LOG(ERROR) << "Window size should be (1,1), but is instead ("
-                 << frame.size.width << "," << frame.size.height << ")";
-      LOG(ERROR) << base::debug::StackTrace().ToString();
-      frame.size = ui::kWindowSizeDeterminedLater.size;
-      [window_ setFrame:frame display:NO];
-    }
-    bubble_width = NSWidth(CalculateWindowFrame(/*expand=*/false));
+    is_expanded_ = false;
+    frame.size.width = NSWidth(CalculateWindowFrame(/*expand=*/false));
+    [window_ setFrame:frame display:NO];
   }
 
-  int text_width = static_cast<int>(bubble_width -
+  int text_width = static_cast<int>(NSWidth(frame) -
                                     kBubbleViewTextPositionX -
                                     kTextPadding);
 
@@ -296,10 +260,8 @@ void StatusBubbleMac::SetText(const base::string16& text, bool is_url) {
     show = false;
 
   if (show) {
-    // Call StartShowing() first to update the current bubble state before
-    // calculating a new size.
-    StartShowing();
     UpdateSizeAndPosition();
+    StartShowing();
   } else {
     StartHiding();
   }
@@ -322,22 +284,21 @@ void StatusBubbleMac::Hide() {
     }
   }
 
-  NSRect frame = CalculateWindowFrame(/*expand=*/false);
   if (!fade_out) {
     // No animation is in progress, so the opacity can be set directly.
     [window_ setAlphaValue:0.0];
     SetState(kBubbleHidden);
-    frame.size = ui::kWindowSizeDeterminedLater.size;
   }
 
   // Stop any width animation and reset the bubble size.
   if (!immediate_) {
     [NSAnimationContext beginGrouping];
     [[NSAnimationContext currentContext] setDuration:kMinimumTimeInterval];
-    [[window_ animator] setFrame:frame display:NO];
+    [[window_ animator] setFrame:CalculateWindowFrame(/*expand=*/false)
+                         display:NO];
     [NSAnimationContext endGrouping];
   } else {
-    [window_ setFrame:frame display:NO];
+    [window_ setFrame:CalculateWindowFrame(/*expand=*/false) display:NO];
   }
 
   [status_text_ release];
@@ -485,14 +446,7 @@ void StatusBubbleMac::Detach() {
   DCHECK(is_attached());
 
   // Magic setFrame: See http://crbug.com/58506 and http://crrev.com/3564021 .
-  // TODO(rohitrao): Does the frame size actually matter here?  Can we always
-  // set it to kWindowSizeDeterminedLater?
-  NSRect frame = [window_ frame];
-  frame.size = ui::kWindowSizeDeterminedLater.size;
-  if (state_ != kBubbleHidden) {
-    frame = CalculateWindowFrame(/*expand=*/false);
-  }
-  [window_ setFrame:frame display:NO];
+  [window_ setFrame:CalculateWindowFrame(/*expand=*/false) display:NO];
   [parent_ removeChildWindow:window_];  // See crbug.com/28107 ...
   [window_ orderOut:nil];               // ... and crbug.com/29054.
 
@@ -518,8 +472,6 @@ void StatusBubbleMac::SetState(StatusBubbleState state) {
     return;
 
   if (state == kBubbleHidden) {
-    is_expanded_ = false;
-
     // When hidden (with alpha of 0), make the window have the minimum size,
     // while still keeping the same origin. It's important to not set the
     // origin to 0,0 as that will cause the window to use more space in
@@ -765,26 +717,6 @@ void StatusBubbleMac::UpdateSizeAndPosition() {
   if (!window_)
     return;
 
-  // There is no need to update the size if the bubble is hidden.
-  if (state_ == kBubbleHidden) {
-    // Verify that hidden bubbles always have size equal to
-    // ui::kWindowSizeDeterminedLater.
-
-    // TODO(rohitrao): The GPU bots are hitting cases where this is not true.
-    // Instead of enforcing this invariant with a DCHECK, add temporary logging
-    // to try and debug it and fix up the window size if needed.
-    // This logging is temporary and should be removed: crbug.com/467998
-    NSRect frame = [window_ frame];
-    if (!CGSizeEqualToSize(frame.size, ui::kWindowSizeDeterminedLater.size)) {
-      LOG(ERROR) << "Window size should be (1,1), but is instead ("
-                 << frame.size.width << "," << frame.size.height << ")";
-      LOG(ERROR) << base::debug::StackTrace().ToString();
-      frame.size = ui::kWindowSizeDeterminedLater.size;
-      [window_ setFrame:frame display:YES];
-    }
-    return;
-  }
-
   SetFrameAvoidingMouse(CalculateWindowFrame(/*expand=*/false),
                         GetMouseLocation());
 }

chrome/browser/ui/cocoa/status_bubble_mac_unittest.mm

@@ -667,19 +667,3 @@ TEST_F(StatusBubbleMacTest, BubbleAvoidsMouse) {
     ASSERT_TRUE(CheckAvoidsMouse(x, smallValue));
   }
 }
-
-TEST_F(StatusBubbleMacTest, ReparentBubble) {
-  // The second window is borderless, like the window used in fullscreen mode.
-  base::scoped_nsobject<NSWindow> fullscreenParent(
-      [[NSWindow alloc] initWithContentRect:NSMakeRect(0, 0, 800, 600)
-                                  styleMask:NSBorderlessWindowMask
-                                    backing:NSBackingStoreBuffered
-                                      defer:NO]);
-
-  // Switch parents with the bubble hidden.
-  bubble_->SwitchParentWindow(fullscreenParent);
-
-  // Switch back to the original parent with the bubble showing.
-  bubble_->SetStatus(UTF8ToUTF16("Showing"));
-  bubble_->SwitchParentWindow(test_window());
-}