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

chrome/browser/renderer_host/render_widget_host_view_win.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 "chrome/browser/renderer_host/render_widget_host_view_win.h"
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/i18n/rtl.h"
@@ skipping 1531 matching lines @@
     wcex.hbrBackground  = NULL;
     wcex.lpszMenuName   = 0;
     wcex.lpszClassName  = L"CompositorHostWindowClass";
     wcex.hIconSm        = 0;
     window_class = RegisterClassEx(&wcex);
     DCHECK(window_class);
   }
 
   RECT currentRect;
   GetClientRect(&currentRect);
-  int width = currentRect.right - currentRect.left;
-  int height = currentRect.bottom - currentRect.top;
+
+  // Ensure window does not have zero area because D3D cannot create a zero
+  // area swap chain.
+  int width = std::max(1,
+      static_cast<int>(currentRect.right - currentRect.left));
+  int height = std::max(1,
+      static_cast<int>(currentRect.bottom - currentRect.top));
 
   compositor_host_window_ = CreateWindowEx(
     WS_EX_LEFT | WS_EX_LTRREADING | WS_EX_RIGHTSCROLLBAR,
     MAKEINTATOM(window_class), 0,
     WS_CHILD | WS_CLIPCHILDREN | WS_CLIPSIBLINGS | WS_DISABLED,
     0, 0, width, height, m_hWnd, 0, GetModuleHandle(NULL), 0);
   ui::CheckWindowCreated(compositor_host_window_);
 
   ui::SetWindowUserData(compositor_host_window_, this);
 
@@ skipping 234 matching lines @@
 }
 
 // static
 RenderWidgetHostView*
     RenderWidgetHostView::GetRenderWidgetHostViewFromNativeView(
         gfx::NativeView native_view) {
   return ::IsWindow(native_view) ?
       reinterpret_cast<RenderWidgetHostView*>(
           ViewProp::GetValue(native_view, kRenderWidgetHostViewKey)) : NULL;
 }