Add SHA1 data checksum to on-disk shader cache

content/browser/gpu/gpu_process_host.h

Index: content/browser/gpu/gpu_process_host.h
diff --git a/content/browser/gpu/gpu_process_host.h b/content/browser/gpu/gpu_process_host.h
index 7fe8079c014786b3301309a2e7c6aa4a1bdab0ae..dd9702b38a684b2e151535773679059fd021b66b 100644
--- a/content/browser/gpu/gpu_process_host.h
+++ b/content/browser/gpu/gpu_process_host.h
@@ -219,7 +219,7 @@ class GpuProcessHost : public BrowserChildProcessHostDelegate,
   // Update GPU crash counters.  Disable GPU if crash limit is reached.
   void RecordProcessCrash();
 
-  std::string GetShaderPrefixKey();
+  std::string GetShaderPrefixKey(const std::string& shader);
 
   // The serial number of the GpuProcessHost / GpuProcessHostUIShim pair.
   int host_id_;
@@ -287,7 +287,7 @@ class GpuProcessHost : public BrowserChildProcessHostDelegate,
       ClientIdToShaderCacheMap;
   ClientIdToShaderCacheMap client_id_to_shader_cache_;
 
-  std::string shader_prefix_key_;
+  std::string shader_prefix_key_info_;
 
   ui::mojom::GpuMainAssociatedPtr gpu_main_ptr_;