[blimp] Add support for having multiple tabs

blimp/client/app/linux/blimp_display_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 "blimp/client/app/linux/blimp_display_manager.h"
 
 #include "blimp/client/app/compositor/browser_compositor.h"
 #include "blimp/client/core/compositor/blimp_compositor_dependencies.h"
 #include "blimp/client/core/compositor/blimp_compositor_manager.h"
 #include "blimp/client/core/contents/tab_control_feature.h"
 #include "blimp/client/core/render_widget/render_widget_feature.h"
 #include "blimp/client/support/compositor/compositor_dependencies_impl.h"
 #include "ui/events/event.h"
 #include "ui/events/gesture_detection/motion_event_generic.h"
 #include "ui/events/gestures/motion_event_aura.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/platform_window/platform_window.h"
 #include "ui/platform_window/x11/x11_window.h"
 
 namespace blimp {
 namespace {
+constexpr int kDummyBlimpContentsId = 0;
 constexpr int kPointer1Id = 0;
 constexpr int kPointer2Id = 1;
 constexpr int kZoomOffsetMultiplier = 4;
 }  // namespace
 
 namespace client {
 
 BlimpDisplayManager::BlimpDisplayManager(
     const gfx::Size& window_size,
     BlimpDisplayManagerDelegate* delegate,
     RenderWidgetFeature* render_widget_feature,
     TabControlFeature* tab_control_feature)
     : device_pixel_ratio_(1.f),
       delegate_(delegate),
       tab_control_feature_(tab_control_feature),
       platform_window_(new ui::X11Window(this)) {
   platform_window_->SetBounds(gfx::Rect(window_size));
 
   compositor_dependencies_ = base::MakeUnique<BlimpCompositorDependencies>(
       base::MakeUnique<CompositorDependenciesImpl>());
 
   compositor_ = base::MakeUnique<BrowserCompositor>(
       compositor_dependencies_->GetEmbedderDependencies());
   compositor_->SetSize(platform_window_->GetBounds().size());
 
   compositor_manager_ = base::MakeUnique<BlimpCompositorManager>(
-      render_widget_feature, compositor_dependencies_.get());
+      kDummyBlimpContentsId, render_widget_feature,
+      compositor_dependencies_.get());
 
   compositor_->SetContentLayer(compositor_manager_->layer());
 
   platform_window_->Show();
 
   tab_control_feature_->SetSizeAndScale(platform_window_->GetBounds().size(),
                                         device_pixel_ratio_);
 }
 
 BlimpDisplayManager::~BlimpDisplayManager() {}
@@ skipping 115 matching lines @@
   }
 }
 
 void BlimpDisplayManager::OnAcceleratedWidgetDestroyed() {
   compositor_manager_->SetVisible(false);
   compositor_->SetAcceleratedWidget(gfx::kNullAcceleratedWidget);
 }
 
 }  // namespace client
 }  // namespace blimp