Create initial GPU backing store in the GPU process for X windows applications.

This gets the window from the RenderWidgetHostViewGtk and just does OpenGL
calls directly into it. There are a lot of bugs, especially around expose
events, which aren't really processed at all, and also tab teardown and
reparenting.

The new backing store defaults to off.

This does some refactoring of the existing Windows GPU process backing store
implementation to make some of it sharable by this Linux verion.

This removes some previously defunct in-process GL backing store code and moves
it to the GPU process.

This patch does some refactoring around how child processes are created using
zygoes or not. I found there were many places where a command line would be
checked with special logic to know whether to enable zygote code or not. I
tried to unify this so it could be computed once for each process type. This is
what most of the changed files in chrome/browser are related to.

BUG=none
TEST=none
Review URL: http://codereview.chromium.org/548112

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@37088 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 41 insertions, 0 deletions

diff --git a/chrome/common/gpu_native_window_handle.h b/chrome/common/gpu_native_window_handle.h
new file mode 100644
index 0000000..9390b77
--- /dev/null
+++ b/chrome/common/gpu_native_window_handle.h
@@ -0,0 +1,41 @@
+// Copyright (c) 2010 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.
+
+#ifndef CHROME_COMMON_GPU_NATIVE_WINDOW_HANDLE_H_
+#define CHROME_COMMON_GPU_NATIVE_WINDOW_HANDLE_H_
+
+#include "build/build_config.h"
+
+// This file defines the window handle type used by the GPU process IPC layer.
+// This is different than gfx::NativeWindow[Id] since on X, this is an XID.
+// Normally, Chrome deals with either GTK window pointers, or magic window
+// IDs that the app generates. The GPU process needs to know the real XID.
+
+#if defined(OS_WIN)
+
+#include <windows.h>
+
+typedef HWND GpuNativeWindowHandle;
+
+#elif defined(OS_LINUX)
+
+// Forward declar XID ourselves to avoid pulling in all of the X headers, which
+// can cause compile problems for some parts of the project.
+typedef unsigned long XID;
+
+typedef XID GpuNativeWindowHandle;
+
+#elif defined(OS_MACOSX)
+
+// The GPU process isn't supported on Mac yet. Defining this arbitrarily allows
+// us to not worry about the integration points not compiling.
+typedef int GpuNativeWindowHandle;
+
+#else
+
+#error define GpuNativeWindowHandle
+
+#endif
+
+#endif  // CHROME_COMMON_GPU_NATIVE_WINDOW_HANDLE_H_