linux_aura: Attempt to green the official builder by reverting unwind support.

This effectively reverts in r243919 and r244331 in a desperate attempt
to fix the tree.

Build fail output:

FAILED: cd ../../chrome; flock -- /tmp/linux_package_lock bash ../out/Release/installer/rpm/build.sh -o../out/Release -b ../out/Release -a ia32 -c beta
Staging common install files in '/tmp/rpm.build.XtJRbJ'...
eu-strip: while computing checksum for debug information: Invalid argument
FAILED: cd ../../chrome; flock -- /tmp/linux_package_lock bash ../out/Release/installer/rpm/build.sh -o../out/Release -b ../out/Release -a ia32 -c unstable
Staging common install files in '/tmp/rpm.build.t4jNp4'...
eu-strip: while computing checksum for debug information: Invalid argument
FAILED: cd ../../chrome; flock -- /tmp/linux_package_lock bash ../out/Release/installer/debian/build.sh -o../out/Release -b ../out/Release -a ia32 -c unstable
Staging common install files in '/tmp/deb.build.CxnH9l'...
eu-strip: while computing checksum for debug information: Invalid argument
Cleaning...
FAILED: cd ../../chrome; flock -- /tmp/linux_package_lock bash ../out/Release/installer/debian/build.sh -o../out/Release -b ../out/Release -a ia32 -c stable
Staging common install files in '/tmp/deb.build.9Zyie1'...
eu-strip: while computing checksum for debug information: Invalid argument
Cleaning...
FAILED: cd ../../chrome; flock -- /tmp/linux_package_lock bash ../out/Release/installer/debian/build.sh -o../out/Release -b ../out/Release -a ia32 -c beta
Staging common install files in '/tmp/deb.build.xUB39X'...
eu-strip: while computing checksum for debug information: Invalid argument
Cleaning...
FAILED: cd ../../chrome; flock -- /tmp/linux_package_lock bash ../out/Release/installer/rpm/build.sh -o../out/Release -b ../out/Release -a ia32 -c stable
Staging common install files in '/tmp/rpm.build.aN0PGV'...
eu-strip: while computing checksum for debug information: Invalid argument
../out/Release/chrome, section '.eh_frame': the call frame entry at offset 0x18 uses a DWARF expression to describe how to recover register '.cfa',  but this translator cannot yet translate DWARF expressions to Breakpad postfix expressions
ninja: build stopped: subcommand failed.

BUG=180975
TBR=spang@chromium.org, stip@chromium.org

Review URL: https://codereview.chromium.org/141013009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245421 0039d316-1c4b-4281-b951-d872f2087c98

build/common.gypi

@@ -1134,9 +1134,6 @@
     'linux_strip_binary%': 0,
     # Strip the test binaries needed for Linux reliability tests.
     'linux_strip_reliability_tests%': 0,
-    # If we want stack unwind support for backtrace().
-    'debug_unwind_tables%': 1,
-    'release_unwind_tables%': 1,
 
     # Enable TCMalloc.
     'linux_use_tcmalloc%': 1,
@@ -1321,10 +1318,6 @@
           # symbols from official builds.
           ['(branding=="Chrome" and buildtype=="Official")', {
             'linux_dump_symbols%': 1,
-
-            # Omit unwind support in official release builds to save space. We
-            # can use breakpad for these builds.
-            'release_unwind_tables%': 0,
           }],
         ],
       }],  # os_posix==1 and OS!="mac" and OS!="ios"
@@ -3046,11 +3039,6 @@
                   '-Wl,--no-as-needed',
                 ],
               }],
-              ['debug_unwind_tables==1', {
-                'cflags': ['-funwind-tables'],
-              }, {
-                'cflags': ['-fno-unwind-tables', '-fno-asynchronous-unwind-tables'],
-              }],
             ],
           },
           'Release_Base': {
@@ -3122,10 +3110,13 @@
                   }],
                 ],
               }],
-              ['release_unwind_tables==1', {
-                'cflags': ['-funwind-tables'],
-              }, {
-                'cflags': ['-fno-unwind-tables', '-fno-asynchronous-unwind-tables'],
+              # Can be omitted to reduce output size. Does not seem to affect
+              # crash reporting.
+              ['target_arch=="ia32"', {
+                'cflags': [
+                  '-fno-unwind-tables',
+                  '-fno-asynchronous-unwind-tables',
+                ],
               }],
             ],
           },