C++11 declares a type safe null pointer

content/common/gpu/media/rendering_helper.cc

Index: content/common/gpu/media/rendering_helper.cc
diff --git a/content/common/gpu/media/rendering_helper.cc b/content/common/gpu/media/rendering_helper.cc
index 6693f5f07dd5a2cb2b983ea5d289d1a1dc7b835c..77931b289bb1ad1832bae8add4c8757649637fcf 100644
--- a/content/common/gpu/media/rendering_helper.cc
+++ b/content/common/gpu/media/rendering_helper.cc
@@ -48,7 +48,7 @@ static void CreateShader(GLuint program,
   glGetShaderiv(shader, GL_COMPILE_STATUS, &result);
   if (!result) {
     char log[4096];
-    glGetShaderInfoLog(shader, arraysize(log), NULL, log);
+    glGetShaderInfoLog(shader, arraysize(log), nullptr, log);
     LOG(FATAL) << log;
   }
   glAttachShader(program, shader);
@@ -135,10 +135,10 @@ void RenderingHelper::Initialize(const RenderingHelperParams& params,
                            0,
                            screen_size_.width(),
                            screen_size_.height(),
-                           NULL,
-                           NULL,
-                           NULL,
-                           NULL);
+                           nullptr,
+                           nullptr,
+                           nullptr,
+                           nullptr);
 #elif defined(USE_X11)
   Display* display = gfx::GetXDisplay();
   Screen* screen = DefaultScreenOfDisplay(display);
@@ -175,7 +175,7 @@ void RenderingHelper::Initialize(const RenderingHelperParams& params,
 
   gl_surface_ = gfx::GLSurface::CreateViewGLSurface(window_);
   gl_context_ = gfx::GLContext::CreateGLContext(
-      NULL, gl_surface_.get(), gfx::PreferIntegratedGpu);
+      nullptr, gl_surface_.get(), gfx::PreferIntegratedGpu);
   gl_context_->MakeCurrent(gl_surface_.get());
 
   CHECK_GT(params.window_sizes.size(), 0U);
@@ -204,7 +204,7 @@ void RenderingHelper::Initialize(const RenderingHelperParams& params,
                  0,
                  GL_RGB,
                  GL_UNSIGNED_SHORT_5_6_5,
-                 NULL);
+                 nullptr);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
@@ -283,7 +283,7 @@ void RenderingHelper::Initialize(const RenderingHelperParams& params,
   glGetProgramiv(program_, GL_LINK_STATUS, &result);
   if (!result) {
     char log[4096];
-    glGetShaderInfoLog(program_, arraysize(log), NULL, log);
+    glGetShaderInfoLog(program_, arraysize(log), nullptr, log);
     LOG(FATAL) << log;
   }
   glUseProgram(program_);
@@ -316,8 +316,8 @@ void RenderingHelper::UnInitialize(base::WaitableEvent* done) {
   }
 
   gl_context_->ReleaseCurrent(gl_surface_.get());
-  gl_context_ = NULL;
-  gl_surface_ = NULL;
+  gl_context_ = nullptr;
+  gl_surface_ = nullptr;
 
   Clear();
   done->Signal();
@@ -348,7 +348,7 @@ void RenderingHelper::CreateTexture(uint32 texture_target,
                  0,
                  GL_RGBA,
                  GL_UNSIGNED_BYTE,
-                 NULL);
+                 nullptr);
   }
   glTexParameteri(texture_target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
   glTexParameteri(texture_target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
@@ -450,9 +450,9 @@ void* RenderingHelper::GetGLDisplay() {
 
 void RenderingHelper::Clear() {
   videos_.clear();
-  message_loop_ = NULL;
-  gl_context_ = NULL;
-  gl_surface_ = NULL;
+  message_loop_ = nullptr;
+  gl_context_ = nullptr;
+  gl_surface_ = nullptr;
 
   render_as_thumbnails_ = false;
   frame_count_ = 0;