DevTools: Do not save split view size on show mode changes.

Source/devtools/front_end/SplitView.js

Index: Source/devtools/front_end/SplitView.js
diff --git a/Source/devtools/front_end/SplitView.js b/Source/devtools/front_end/SplitView.js
index dd61510f43e0e7ead60ab156b2d5818252a4bcc6..10abe6132bd2786f0691e550070bb13ebf15efda 100644
--- a/Source/devtools/front_end/SplitView.js
+++ b/Source/devtools/front_end/SplitView.js
@@ -68,11 +68,11 @@ WebInspector.SplitView = function(isVertical, secondIsSidebar, settingName, defa
     this._resizable = true;
     this._useDip = !!useDip;
 
-    this._savedSidebarWidth = defaultSidebarWidth || 200;
-    this._savedSidebarHeight = defaultSidebarHeight || this._savedSidebarWidth;
+    this._defaultSidebarWidth = defaultSidebarWidth || 200;
+    this._defaultSidebarHeight = defaultSidebarHeight || this._defaultSidebarWidth;
 
-    if (0 < this._savedSidebarWidth && this._savedSidebarWidth < 1 &&
-        0 < this._savedSidebarHeight && this._savedSidebarHeight < 1)
+    if (0 < this._defaultSidebarWidth && this._defaultSidebarWidth < 1 &&
+        0 < this._defaultSidebarHeight && this._defaultSidebarHeight < 1)
         this._useFraction = true;
 
     this._settingName = settingName;
@@ -136,6 +136,9 @@ WebInspector.SplitView.prototype = {
         this.element.classList.add(this._isVertical ? "hbox" : "vbox");
         delete this._resizerElementSize;
         this._sidebarSize = -1;
+        this._restoreSidebarSizeFromSettings();
+        if (this._shouldSaveShowMode)
+            this._showMode = this._savedShowMode();
     },
 
     /**
@@ -144,7 +147,7 @@ WebInspector.SplitView.prototype = {
     _updateLayout: function(animate)
     {
         delete this._totalSize; // Lazy update.
-        this._innerSetSidebarSize(this._lastSidebarSize(), false, animate);
+        this._innerSetSidebarSize(this._preferredSidebarSize(), false, animate);
     },
 
     /**
@@ -235,7 +238,7 @@ WebInspector.SplitView.prototype = {
      */
     desiredSidebarSize: function()
     {
-        return this._lastSidebarSize();
+        return this._preferredSidebarSize();
     },
 
     /**
@@ -351,7 +354,7 @@ WebInspector.SplitView.prototype = {
     setSidebarSize: function(size)
     {
         this._innerSetSidebarSize(size);
-        this._saveSetting();
+        this._updatePreferredSidebarSize();
     },
 
     /**
@@ -605,6 +608,7 @@ WebInspector.SplitView.prototype = {
     {
         if (this._useDip)
             WebInspector.zoomManager.addEventListener(WebInspector.ZoomManager.Events.ZoomChanged, this._onZoomChanged, this);
+        this._restoreSidebarSizeFromSettings();
         this._updateLayout();
     },
 
@@ -628,7 +632,6 @@ WebInspector.SplitView.prototype = {
         if (!this._resizable)
             return false;
 
-        this._saveSetting();
         this._dragOffset = (this._secondIsSidebar ? this.totalSize() - this._sidebarSize : this._sidebarSize) - (this._isVertical ? event.pageX : event.pageY);
         return true;
     },
@@ -650,7 +653,7 @@ WebInspector.SplitView.prototype = {
     _endResizerDragging: function(event)
     {
         delete this._dragOffset;
-        this._saveSetting();
+        this._updatePreferredSidebarSize();
     },
 
     hideDefaultResizer: function()
@@ -728,17 +731,23 @@ WebInspector.SplitView.prototype = {
     /**
      * @return {number}
      */
-    _lastSidebarSize: function()
+    _preferredSidebarSize: function()
     {
-        var settingForOrientation = this._settingForOrientation();
-        var size = settingForOrientation ? settingForOrientation.size : 0;
-        if (!size)
-             size = this._isVertical ? this._savedSidebarWidth : this._savedSidebarHeight;
+        var size = this._savedSidebarSize;
         if (this._useFraction)
             size *= this.totalSize();
         return size;
     },
 
+    _restoreSidebarSizeFromSettings: function()
+    {
+        var settingForOrientation = this._settingForOrientation();
+        var size = settingForOrientation ? settingForOrientation.size : 0;
+        if (!size)
+             size = this._isVertical ? this._defaultSidebarWidth : this._defaultSidebarHeight;
+        this._savedSidebarSize = size;
+    },
+
     /**
      * @return {string}
      */
@@ -759,16 +768,15 @@ WebInspector.SplitView.prototype = {
         return size;
     },
 
-    _saveSetting: function()
+    _updatePreferredSidebarSize: function()
     {
-        var size = this._sizeToSave();
+        this._savedSidebarSize = this._sizeToSave();
+        this._saveSetting();
+    },
 
-        if (size !== -1) {
-            if (this._isVertical)
-                this._savedSidebarWidth = size;
-            else
-                this._savedSidebarHeight = size;
-        }
+    _saveSetting: function()
+    {
+        var size = this._savedSidebarSize;
 
         var setting = this._setting();
         if (!setting)
@@ -793,7 +801,7 @@ WebInspector.SplitView.prototype = {
     {
         var data = /** @type {{from: number, to: number}} */ (event.data);
         this._innerSetSidebarSize(this.sidebarSize() * data.from / data.to, true);
-        this._saveSetting();
+        this._updatePreferredSidebarSize();
     },
 
     /**