Add BubbleManager to manage bubbles and ChromeBubbleManager for events.

components/bubble/bubble_manager.cc

+// Copyright 2015 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 "components/bubble/bubble_manager.h"
+
+#include <vector>
+
+#include "components/bubble/bubble_controller.h"
+
+BubbleManager::~BubbleManager() {}
+
+BubbleReference BubbleManager::ShowBubble(scoped_ptr<BubbleDelegate> bubble) {
+  DCHECK(bubble);
+  scoped_ptr<BubbleController> controller(new BubbleController(bubble.Pass()));
+
+  BubbleReference bubble_ref = controller->AsWeakPtr();
+  ShowBubbleUI(bubble_ref);
+
+  controllers_.push_back(controller.Pass());
+  return bubble_ref;
+}
+
+bool BubbleManager::CloseBubble(BubbleReference bubble,
+                                BubbleCloseReason reason) {
+  for (auto iter = controllers_.begin(); iter != controllers_.end(); ++iter) {
+    if (*iter == bubble.get()) {
+      if (ShouldClose((*iter)->AsWeakPtr(), reason)) {
+        // Remove the controller before attempting to delete because some
+        // delegates may chain showing more bubbles.
+        BubbleController* controller = *iter;
+        controllers_.weak_erase(iter);

[msw, 2015/08/18 17:26:19]

This should update iter, otherwise it'll be invalid:
  iter = controllers.weak_erase(iter);

[hcarmona, 2015/08/18 23:08:48]

Done.

+        delete controller;
+        return true;
+      }
+      return false;
+    }
+  }
+
+  // Attempting to close a bubble that is already closed or that this manager
+  // doesn't own is a bug.
+  NOTREACHED();
+  return false;
+}
+
+void BubbleManager::UpdateAllBubbleAnchors() {
+  for (auto controller : controllers_) {

[msw, 2015/08/18 17:26:19]

nit: curly braces not needed here.

[hcarmona, 2015/08/18 23:08:48]

Done.

+    UpdateAnchorPosition(controller->AsWeakPtr());
+  }
+}
+
+BubbleManager::BubbleManager() {}
+
+void BubbleManager::CloseAllBubbles(BubbleCloseReason reason) {
+  std::vector<BubbleController*> closing;
+
+  for (auto iter = controllers_.begin(); iter != controllers_.end();) {
+    if (ShouldClose((*iter)->AsWeakPtr(), reason)) {
+      // Remove the controllers before attempting to delete because some

[msw, 2015/08/18 17:26:19]

What happens on BubbleManager destruction (browser window closing) with a
chaining bubble open? I don't see any explicit handling. The scoped vector of
controllers will be destroyed normally and BubbleManager::ShowBubble will get
called during destruction... We should cover this in automated testing.

[hcarmona, 2015/08/18 23:08:48]

Yes, I'll create a test for this scenario.

Added TODO item in destructor. This should be fixed with queuing of
pending show requests in ShouldHide. We would end up with a queue of
pending bubbles that we can destroy without showing, so they won't add
more bubbles.

[msw, 2015/08/19 00:18:11]

sgtm, thanks.

+      // delegates may chain showing more bubbles.
+      closing.push_back(*iter);
+      iter = controllers_.weak_erase(iter);
+      continue;
+    }
+    ++iter;
+  }
+
+  for (auto iter : closing) {

[msw, 2015/08/18 17:26:20]

Use STLDeleteElements or STLElementDeleter.

[hcarmona, 2015/08/18 23:08:48]

Done.

+    delete iter;
+    // No need to remove from the vector after deleting.
+  }
+}
+
+void BubbleManager::ShowBubbleUI(base::WeakPtr<BubbleController> controller) {

[msw, 2015/08/18 17:26:20]

Why not just inline this?

[hcarmona, 2015/08/18 23:08:48]

Can't inline virtual functions. These functions are virtual because the
ChromeBubbleManager wants to assert that they are run in the UI thread.

[msw, 2015/08/19 00:18:11]

Sorry, what I meant is that we shouldn't define a BubbleManager::ShowBubbleUI
function at all, BubbleManager::ShowBubble should call |controller->Show()|
directly instead. Ditto for the functions below (remove them and call the
controller functions directly in the code above).

[hcarmona, 2015/08/20 02:34:31]

Done. Moved the UI thread check to here.

+  controller->Show();
+}
+
+bool BubbleManager::ShouldClose(base::WeakPtr<BubbleController> controller,

[msw, 2015/08/18 17:26:20]

Ditto: Inline this.

[hcarmona, 2015/08/18 23:08:48]

Same: virtual

+                                BubbleCloseReason reason) {
+  return controller->ShouldClose(reason);
+}
+
+void BubbleManager::UpdateAnchorPosition(

[msw, 2015/08/18 17:26:20]

Ditto: Inline this.

[hcarmona, 2015/08/18 23:08:48]

Same: virtual

+    base::WeakPtr<BubbleController> controller) {
+  controller->UpdateAnchorPosition();
+}