clang-format all pdfium code.

fpdfsdk/include/pdfwindow/PWL_Button.h

Index: fpdfsdk/include/pdfwindow/PWL_Button.h
diff --git a/fpdfsdk/include/pdfwindow/PWL_Button.h b/fpdfsdk/include/pdfwindow/PWL_Button.h
index 4937841819ae20abbe761e78c24ca4618f4e5306..363556762fb780dd3d78be7d960a6e0af9becde2 100644
--- a/fpdfsdk/include/pdfwindow/PWL_Button.h
+++ b/fpdfsdk/include/pdfwindow/PWL_Button.h
@@ -9,19 +9,18 @@
 
 #include "PWL_Wnd.h"
 
-class CPWL_Button : public CPWL_Wnd
-{
-public:
-	CPWL_Button();
-	virtual ~CPWL_Button();
+class CPWL_Button : public CPWL_Wnd {
+ public:
+  CPWL_Button();
+  virtual ~CPWL_Button();
 
-	virtual CFX_ByteString		GetClassName() const;
-	virtual void				OnCreate(PWL_CREATEPARAM & cp);
-	virtual FX_BOOL				OnLButtonDown(const CPDF_Point & point, FX_DWORD nFlag);
-	virtual FX_BOOL				OnLButtonUp(const CPDF_Point & point, FX_DWORD nFlag);
+  virtual CFX_ByteString GetClassName() const;
+  virtual void OnCreate(PWL_CREATEPARAM& cp);
+  virtual FX_BOOL OnLButtonDown(const CPDF_Point& point, FX_DWORD nFlag);
+  virtual FX_BOOL OnLButtonUp(const CPDF_Point& point, FX_DWORD nFlag);
 
-protected:
-	FX_BOOL						m_bMouseDown;
+ protected:
+  FX_BOOL m_bMouseDown;
 };
 
 #endif  // FPDFSDK_INCLUDE_PDFWINDOW_PWL_BUTTON_H_