Remove a bunch of TOOLKIT_GTK in content/ and gpu/, as well as NPAPI plugins on linux

content/renderer/pepper/ppb_image_data_impl.cc

Index: content/renderer/pepper/ppb_image_data_impl.cc
diff --git a/content/renderer/pepper/ppb_image_data_impl.cc b/content/renderer/pepper/ppb_image_data_impl.cc
index 80cc38dcd3dead824c9087574766442d7e1d8920..6abd8f50cf4ec0e57a045b652ab18dec4c3a1dd3 100644
--- a/content/renderer/pepper/ppb_image_data_impl.cc
+++ b/content/renderer/pepper/ppb_image_data_impl.cc
@@ -29,7 +29,7 @@ namespace {
 // Returns true if the ImageData shared memory should be allocated in the
 // browser process for the current platform.
 bool IsBrowserAllocated() {
-#if defined(OS_POSIX) && !defined(TOOLKIT_GTK) && !defined(OS_ANDROID)
+#if defined(OS_POSIX) && !defined(OS_ANDROID)
   // On the Mac, shared memory has to be created in the browser in order to
   // work in the sandbox.
   return true;
@@ -243,8 +243,6 @@ int32_t ImageDataPlatformBackend::GetSharedMemory(int* handle,
   *byte_count = dib_->size();
 #if defined(OS_WIN)
   *handle = reinterpret_cast<intptr_t>(dib_->handle());
-#elif defined(TOOLKIT_GTK)
-  *handle = static_cast<intptr_t>(dib_->handle());
 #else
   *handle = static_cast<intptr_t>(dib_->handle().fd);
 #endif