Give Chrome OS more GPU memory

content/common/gpu/gpu_memory_manager.h

Index: content/common/gpu/gpu_memory_manager.h
diff --git a/content/common/gpu/gpu_memory_manager.h b/content/common/gpu/gpu_memory_manager.h
index 015f0b03eae0576cad1bb13d4464c549e389b1ce..af78f577d1c3f5b561e1d4d98fe930519fdaa011 100644
--- a/content/common/gpu/gpu_memory_manager.h
+++ b/content/common/gpu/gpu_memory_manager.h
@@ -103,7 +103,11 @@ class CONTENT_EXPORT GpuMemoryManager :
 
   // The maximum amount of memory that a tab may be assigned
   size_t GetMaximumTabAllocation() const {
+#if defined(OS_CHROMEOS)
+    return bytes_available_gpu_memory_;
+#else
     return 128 * 1024 * 1024;
+#endif
   }
 
   // The minimum non-zero amount of memory that a tab may be assigned