Adding a way to disable debug fission.

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index 8e48115a01d20f9fe91015a39b49b502f36dc59e..9ba5372d9917fd6a2fa0aef07745ff38659488f5 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -1186,6 +1186,14 @@
     'binutils_version%': 0,
     'binutils_dir%': '',
 
+    # Set this to false will disable debug fission for debug builds.
+    # Needed if your tooling (distcc, ccache) is too old for debug fission
+    # support or you want to use an older gdb.
+    # See https://code.google.com/p/chromium/issues/detail?id=352046 and
+    # http://gcc.gnu.org/wiki/DebugFission for more information on debug
+    # fission.
+    'debug_fission%': 1,
+
     # Enable TCMalloc.
     # TODO(dmikurube): Change Linux default of use_allocator to "tcmalloc".
     # TODO(dmikurube): Change Android default of use_allocator to "none".
@@ -3205,7 +3213,7 @@
               }],
               # http://gcc.gnu.org/wiki/DebugFission
               # Requires gold and gcc >= 4.8 or clang.
-              ['linux_use_gold_flags==1 and (clang==1 or gcc_version>=48) and binutils_version>=223', {
+              ['linux_use_gold_flags==1 and (clang==1 or gcc_version>=48) and binutils_version>=223 and debug_fission==1', {
                 'cflags': ['-gsplit-dwarf'],
                 'ldflags': ['-Wl,--gdb-index'],
               }],