gpu: Remove Create/DeleteImage IPC by adding an X11_PIXMAP_BUFFER GpuMemoryBuffer type.

content/common/gpu/gpu_command_buffer_stub.cc

Index: content/common/gpu/gpu_command_buffer_stub.cc
diff --git a/content/common/gpu/gpu_command_buffer_stub.cc b/content/common/gpu/gpu_command_buffer_stub.cc
index 3795fa7acf1e09a2c7472093ce1e3d2967cee6c1..026184c96230cbf856d72d4f51360fb4999427e5 100644
--- a/content/common/gpu/gpu_command_buffer_stub.cc
+++ b/content/common/gpu/gpu_command_buffer_stub.cc
@@ -14,6 +14,7 @@
 #include "content/common/gpu/gpu_channel.h"
 #include "content/common/gpu/gpu_channel_manager.h"
 #include "content/common/gpu/gpu_command_buffer_stub.h"
+#include "content/common/gpu/gpu_memory_buffer_factory.h"
 #include "content/common/gpu/gpu_memory_manager.h"
 #include "content/common/gpu/gpu_memory_tracking.h"
 #include "content/common/gpu/gpu_messages.h"
@@ -928,13 +929,19 @@ void GpuCommandBufferStub::OnSetClientHasMemoryAllocationChangedCallback(
 
 void GpuCommandBufferStub::OnRegisterGpuMemoryBuffer(
     int32 id,
-    gfx::GpuMemoryBufferHandle gpu_memory_buffer,
+    gfx::GpuMemoryBufferHandle handle,
     uint32 width,
     uint32 height,
     uint32 internalformat) {
   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnRegisterGpuMemoryBuffer");
+
+  // Verify that renderer is not trying to use a buffer it doesn't own.
+  if (!GpuMemoryBufferFactory::RequestAccessToGpuMemoryBuffer(
+          handle, channel()->client_id())) {
+    LOG(ERROR) << "Access to GPU memory buffer by renderer denied.";
+    return;
+  }
 #if defined(OS_ANDROID)
-  // Verify that renderer is not trying to use a surface texture it doesn't own.
   if (gpu_memory_buffer.type == gfx::SURFACE_TEXTURE_BUFFER &&
       gpu_memory_buffer.surface_texture_id.secondary_id !=
           channel()->client_id()) {
@@ -942,9 +949,10 @@ void GpuCommandBufferStub::OnRegisterGpuMemoryBuffer(
     return;
   }
 #endif
+
   if (gpu_control_service_) {
     gpu_control_service_->RegisterGpuMemoryBuffer(
-        id, gpu_memory_buffer, width, height, internalformat);
+        id, handle, width, height, internalformat);
   }
 }