Ensure that the GPU compositing window does not have zero area on windows.

content/browser/gpu/gpu_process_host_ui_shim.cc

 // Copyright (c) 2011 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 "content/browser/gpu/gpu_process_host_ui_shim.h"
 
+#include <algorithm>
+
 #include "base/id_map.h"
 #include "base/process_util.h"
 #include "base/debug/trace_event.h"
 #include "content/browser/browser_thread.h"
 #include "content/browser/gpu/gpu_data_manager.h"
 #include "content/browser/gpu/gpu_process_host.h"
 #include "content/browser/renderer_host/render_process_host.h"
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/renderer_host/render_widget_host_view.h"
 #include "content/common/gpu/gpu_messages.h"
@@ skipping 170 matching lines @@
       // to be.
 #if defined(TOOLKIT_USES_GTK) && !defined(TOUCH_UI)
       GdkWindow* window = reinterpret_cast<GdkWindow*>(
           gdk_xid_table_lookup(handle));
       if (window) {
         Display* display = GDK_WINDOW_XDISPLAY(window);
         gdk_window_resize(window, size.width(), size.height());
         XSync(display, False);
       }
 #elif defined(OS_WIN)
+      // Ensure window does not have zero area because D3D cannot create a zero
+      // area swap chain.
       SetWindowPos(handle,
           NULL,
           0, 0,
-          size.width(),
-          size.height(),
+          std::max(1, size.width()),
+          std::max(1, size.height()),
           SWP_NOSENDCHANGING | SWP_NOCOPYBITS | SWP_NOZORDER |
               SWP_NOACTIVATE | SWP_DEFERERASE);
 #endif
     }
   }
 
   // Always respond even if the window no longer exists. The GPU process cannot
   // make progress on the resizing command buffer until it receives the
   // response.
   Send(new GpuMsg_ResizeViewACK(renderer_id, command_buffer_route_id));
@@ skipping 32 matching lines @@
       params.window,
       params.surface_id,
       // Parameters needed to formulate an acknowledgment.
       params.renderer_id,
       params.route_id,
       host_id_,
       params.swap_buffers_count);
 }
 
 #endif