linux: reduce header interdependencies

By analyzing gcc -H output, I found some of our worst offenders for
headers bringing in other headers.  native_web_keyboard_event.h was
responsible for just under 60,000 extra includes!

This change will in theory make the build faster.

Review URL: http://codereview.chromium.org/524004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@35326 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 53 insertions, 2 deletions

diff --git a/app/gfx/native_widget_types.h b/app/gfx/native_widget_types.h
index eda722d..ba845a0 100644
--- a/app/gfx/native_widget_types.h
+++ b/app/gfx/native_widget_types.h
@@ -48,10 +48,10 @@ class NSTextField;
 #endif  // __OBJC__
 #elif defined(USE_X11)
 typedef struct _GdkCursor GdkCursor;
+typedef struct _GdkRegion GdkRegion;
 typedef struct _GtkWidget GtkWidget;
 typedef struct _GtkWindow GtkWindow;
 typedef struct _cairo cairo_t;
-typedef struct _GdkRegion GdkRegion;
 #endif
 
 namespace gfx {
diff --git a/app/scoped_handle_gtk.h b/app/scoped_handle_gtk.h
new file mode 100644
index 0000000..d501f91
--- /dev/null
+++ b/app/scoped_handle_gtk.h
@@ -0,0 +1,50 @@
+// Copyright (c) 2009 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 APP_SCOPED_HANDLE_GTK_H_
+#define APP_SCOPED_HANDLE_GTK_H_
+
+#include <gdk/gdk.h>
+
+// Wraps a GdkRegion. This class provides the same methods as ScopedGDIObject in
+// scoped_handle_win.
+class ScopedRegion {
+ public:
+  ScopedRegion() : region_(NULL) {}
+  explicit ScopedRegion(GdkRegion* region) : region_(region) {}
+
+  ~ScopedRegion() {
+    Close();
+  }
+
+  void Set(GdkRegion* region) {
+    Close();
+
+    region_ = region;
+  }
+
+  GdkRegion* Get() {
+    return region_;
+  }
+
+  GdkRegion* release() {
+    GdkRegion* region = region_;
+    region_ = NULL;
+    return region;
+  }
+
+ private:
+  void Close() {
+    if (region_) {
+      gdk_region_destroy(region_);
+      region_ = NULL;
+    }
+  }
+
+  GdkRegion* region_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedRegion);
+};
+
+#endif  // APP_SCOPED_HANDLE_GTK_H_
diff --git a/app/theme_provider.h b/app/theme_provider.h
index 0bd7ae1..13b421e 100644
--- a/app/theme_provider.h
+++ b/app/theme_provider.h
@@ -11,7 +11,8 @@
 #include "third_party/skia/include/core/SkColor.h"
 
 #if defined(OS_LINUX)
-#include <gdk/gdk.h>
+typedef struct _GdkColor GdkColor;
+typedef struct _GdkPixbuf GdkPixbuf;
 #elif defined(OS_MACOSX)
 #ifdef __OBJC__
 @class NSColor;