Allow "float-abi" to be configurable at gyp time for ARM build

build/common.gypi

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 707 matching lines @@
     # Set to 1 to link against gsettings APIs instead of using dlopen().
     'linux_link_gsettings%': 0,
 
     # Set Thumb compilation flags.
     'arm_thumb%': 0,
 
     # Set ARM fpu compilation flags (only meaningful if armv7==1 and
     # arm_neon==0).
     'arm_fpu%': 'vfpv3',
 
+    # Set ARM float abi compilation flag.
+    'arm_float_abi%': 'softfp',
+
     # Enable new NPDevice API.
     'enable_new_npdevice_api%': 0,
 
     # Enable EGLImage support in OpenMAX
     'enable_eglimage%': 1,
 
     # Enable a variable used elsewhere throughout the GYP files to determine
     # whether to compile in the sources for the GPU plugin / process.
     'enable_gpu%': 1,
 
@@ skipping 1330 matching lines @@
                 'conditions': [
                   ['arm_thumb==1', {
                     'cflags': [
                     '-mthumb',
                     ]
                   }],
                   ['armv7==1', {
                     'cflags': [
                       '-march=armv7-a',
                       '-mtune=cortex-a8',
-                      '-mfloat-abi=softfp',
+                      '-mfloat-abi=<(arm_float_abi)',
                     ],
                     'conditions': [
                       ['arm_neon==1', {
                         'cflags': [ '-mfpu=neon', ],
                       }, {
                         'cflags': [ '-mfpu=<(arm_fpu)', ],
                       }]
                     ],
                   }],
                   ['OS=="android"', {
@@ skipping 973 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }