GpuMemoryManager suggests values for renderer Contents Texture Managers' preferred memory limit.

content/common/gpu/gpu_memory_allocation.h

Index: content/common/gpu/gpu_memory_allocation.h
diff --git a/content/common/gpu/gpu_memory_allocation.h b/content/common/gpu/gpu_memory_allocation.h
index b38fe8320403a9bd8327dc659963479e7914867a..3df1c66a7757daf6b1bcc075d032e6e778c03e2c 100644
--- a/content/common/gpu/gpu_memory_allocation.h
+++ b/content/common/gpu/gpu_memory_allocation.h
@@ -12,7 +12,6 @@
 // and assigned to the browser and renderer context.
 // They will change over time, given memory availability, and browser state.
 
-
 // Memory Allocation which will be assigned to the renderer context.
 struct GpuMemoryAllocationForRenderer {
   enum {
@@ -68,6 +67,13 @@ struct GpuMemoryAllocationForBrowser {
 // GpuMemoryManager.
 struct GpuMemoryAllocation : public GpuMemoryAllocationForRenderer,
                              public GpuMemoryAllocationForBrowser {
+  // Bitmap
+  enum BufferAllocation {
+    kHasNoBuffers = 0,
+    kHasFrontbuffer = 1,
+    kHasBackbuffer = 2
+  };
+
   GpuMemoryAllocation()
       : GpuMemoryAllocationForRenderer(),
         GpuMemoryAllocationForBrowser() {
@@ -81,6 +87,13 @@ struct GpuMemoryAllocation : public GpuMemoryAllocationForRenderer,
         GpuMemoryAllocationForBrowser(suggest_have_frontbuffer) {
   }
 
+  GpuMemoryAllocation(size_t gpu_resource_size_in_bytes,
+                      int allocationBitmap)
+      : GpuMemoryAllocationForRenderer(gpu_resource_size_in_bytes,
+                                       allocationBitmap & kHasBackbuffer),
+        GpuMemoryAllocationForBrowser(allocationBitmap & kHasFrontbuffer) {
+  }
+
   bool operator==(const GpuMemoryAllocation& other) const {
       return static_cast<const GpuMemoryAllocationForRenderer&>(*this) ==
              static_cast<const GpuMemoryAllocationForRenderer&>(other) &&