--- chromium-68.0.3440.106/mojo/core/data_pipe_consumer_dispatcher.cc.gcc8	2018-08-14 03:11:50.492927855 +0200
+++ chromium-68.0.3440.106/mojo/core/data_pipe_consumer_dispatcher.cc	2018-08-14 03:12:32.254163933 +0200
@@ -40,7 +40,7 @@
   uint64_t buffer_guid_high;
   uint64_t buffer_guid_low;
   char padding[7];
-};
+} __attribute__ ((aligned(8)));
 
 static_assert(sizeof(SerializedState) % 8 == 0,
               "Invalid SerializedState size.");
--- chromium-68.0.3440.106/mojo/core/data_pipe_producer_dispatcher.cc.gcc8	2018-08-14 03:11:52.923883382 +0200
+++ chromium-68.0.3440.106/mojo/core/data_pipe_producer_dispatcher.cc	2018-08-14 03:12:35.341107472 +0200
@@ -39,7 +39,7 @@
   uint64_t buffer_guid_high;
   uint64_t buffer_guid_low;
   char padding[7];
-};
+} __attribute__ ((aligned(8)));
 
 static_assert(sizeof(SerializedState) % 8 == 0,
               "Invalid SerializedState size.");
--- chromium-68.0.3440.106/mojo/public/tools/bindings/generators/cpp_templates/struct_declaration.tmpl.gcc8	2018-08-14 21:12:13.141558150 +0200
+++ chromium-68.0.3440.106/mojo/public/tools/bindings/generators/cpp_templates/struct_declaration.tmpl	2018-08-14 21:13:14.068493440 +0200
@@ -1,6 +1,6 @@
 {%- set class_name = struct.name ~ "_Data" -%}
 
-class {{export_attribute}} {{class_name}} {
+class {{export_attribute}}  __attribute__ ((aligned(8))) {{class_name}} {
  public:
   class BufferWriter {
    public:
--- chromium-68.0.3440.106/mojo/public/tools/bindings/generators/cpp_templates/union_declaration.tmpl.gcc8	2018-08-14 21:12:15.324520008 +0200
+++ chromium-68.0.3440.106/mojo/public/tools/bindings/generators/cpp_templates/union_declaration.tmpl	2018-08-14 21:13:16.724447019 +0200
@@ -2,7 +2,7 @@
 {%- set enum_name = union.name ~ "_Tag" -%}
 {%- import "struct_macros.tmpl" as struct_macros %}
 
-class {{export_attribute}} {{class_name}} {
+class {{export_attribute}}  __attribute__ ((aligned(8))) {{class_name}} {
  public:
   // Used to identify Mojom Union Data Classes.
   typedef void MojomUnionDataType;
--- chromium-68.0.3440.106/mojo/public/c/system/message_pipe.h.gcc8	2018-08-08 21:11:05.000000000 +0200
+++ chromium-68.0.3440.106/mojo/public/c/system/message_pipe.h	2018-08-18 15:08:11.059119547 +0200
@@ -35,7 +35,6 @@
   // See |MojoCreateMessagePipeFlags|.
   MojoCreateMessagePipeFlags flags;
 };
-MOJO_STATIC_ASSERT(MOJO_ALIGNOF(int64_t) <= 8, "int64_t has weird alignment");
 MOJO_STATIC_ASSERT(sizeof(struct MojoCreateMessagePipeOptions) == 8,
                    "MojoCreateMessagePipeOptions has wrong size");
 
--- chromium-68.0.3440.106/mojo/public/c/system/data_pipe.h.gcc8	2018-08-08 21:11:05.000000000 +0200
+++ chromium-68.0.3440.106/mojo/public/c/system/data_pipe.h	2018-08-18 15:13:42.028075568 +0200
@@ -40,7 +40,6 @@
   // system-dependent capacity of at least one element in size.
   uint32_t capacity_num_bytes;
 };
-MOJO_STATIC_ASSERT(MOJO_ALIGNOF(int64_t) <= 8, "int64_t has weird alignment");
 MOJO_STATIC_ASSERT(sizeof(struct MojoCreateDataPipeOptions) == 16,
                    "MojoCreateDataPipeOptions has wrong size");
 
--- chromium-68.0.3440.106/mojo/public/c/system/buffer.h.gcc8	2018-08-08 21:11:05.000000000 +0200
+++ chromium-68.0.3440.106/mojo/public/c/system/buffer.h	2018-08-18 15:15:18.766308780 +0200
@@ -30,7 +30,6 @@
   // See |MojoCreateSharedBufferFlags|.
   MojoCreateSharedBufferFlags flags;
 };
-MOJO_STATIC_ASSERT(MOJO_ALIGNOF(int64_t) <= 8, "int64_t has weird alignment");
 MOJO_STATIC_ASSERT(sizeof(struct MojoCreateSharedBufferOptions) == 8,
                    "MojoCreateSharedBufferOptions has wrong size");
 
--- chromium-68.0.3440.106/mojo/core/options_validation_unittest.cc.gcc8	2018-08-08 21:11:05.000000000 +0200
+++ chromium-68.0.3440.106/mojo/core/options_validation_unittest.cc	2018-08-18 15:16:30.947990424 +0200
@@ -18,7 +18,6 @@
 
 using TestOptionsFlags = uint32_t;
 
-static_assert(MOJO_ALIGNOF(int64_t) <= 8, "int64_t has weird alignment");
 struct MOJO_ALIGNAS(8) TestOptions {
   uint32_t struct_size;
   TestOptionsFlags flags;