Attempt 3 at a better touch tabstrip. There is still a bunch to do,

chrome/browser/ui/views/tabs/base_tab.cc

 // 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 "chrome/browser/ui/views/tabs/base_tab.h"
 
 #include <limits>
 
 #include "base/command_line.h"
 #include "base/utf_string_conversions.h"
@@ skipping 272 matching lines @@
   return tp ? tp : theme_provider_;
 }
 
 bool BaseTab::OnMousePressed(const views::MouseEvent& event) {
   if (!controller())
     return false;
 
   if (event.IsOnlyLeftMouseButton()) {
     TabStripSelectionModel original_selection;
     original_selection.Copy(controller()->GetSelectionModel());
-    if (event.IsShiftDown() && event.IsControlDown()) {
-      controller()->AddSelectionFromAnchorTo(this);
-    } else if (event.IsShiftDown()) {
-      controller()->ExtendSelectionTo(this);
-    } else if (event.IsControlDown()) {
-      controller()->ToggleSelected(this);
-      if (!IsSelected()) {
-        // Don't allow dragging non-selected tabs.
-        return false;
+    if (controller()->SupportsMultipleSelection()) {
+      if (event.IsShiftDown() && event.IsControlDown()) {
+        controller()->AddSelectionFromAnchorTo(this);
+      } else if (event.IsShiftDown()) {
+        controller()->ExtendSelectionTo(this);
+      } else if (event.IsControlDown()) {
+        controller()->ToggleSelected(this);
+        if (!IsSelected()) {
+          // Don't allow dragging non-selected tabs.
+          return false;
+        }
+      } else if (!IsSelected()) {
+        controller()->SelectTab(this);
+      } else if (IsActive()) {
+        controller()->ClickActiveTab(this);
       }
     } else if (!IsSelected()) {
       controller()->SelectTab(this);
-    } else if (IsActive()) {
-      controller()->ClickActiveTab(this);
     }
     controller()->MaybeStartDrag(this, event, original_selection);
   }
   return true;
 }
 
 bool BaseTab::OnMouseDragged(const views::MouseEvent& event) {
   if (controller())
     controller()->ContinueDrag(event);
   return true;
@@ skipping 252 matching lines @@
 // static
 void BaseTab::InitResources() {
   static bool initialized = false;
   if (!initialized) {
     initialized = true;
     ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
     font_ = new gfx::Font(rb.GetFont(ui::ResourceBundle::BaseFont));
     font_height_ = font_->GetHeight();
   }
 }